William Checkley

Molecular determinants of lung development.

Chronic exposure to biomass fuel is associated with increased carotid artery intima-media thickness and a higher prevalence of atherosclerotic plaque.

Role of exhaled nitric oxide as a predictor of atopy.

Diarrhea in Early Childhood: Short-term Association With Weight and Long-term Association With Length.

Helicobacter pylori infection in infants and toddlers in South America: concordance between [13C]urea breath test and monoclonal H. pylori stool antigen test.

Feasibility intervention trial of two types of improved cookstoves in three resource-limited settings: study protocol for a randomized controlled trial.

Structure, process, and annual ICU mortality across 69 centers: United States Critical Illness and Injury Trials Group Critical Illness Outcomes Study.

Multiple norovirus infections in a birth cohort in a Peruvian Periurban community.

Longitudinal assessment of high versus low levels of fractional exhaled nitric oxide among children with asthma and atopy.

A cross-sectional study of differences in 6-min walk distance in healthy adults residing at high altitude versus sea level.

An unforgettable event: a qualitative study of the 1997-98 El Niño in northern Peru.

A cross-sectional study of determinants of indoor environmental exposures in households with and without chronic exposure to biomass fuel smoke.

Measuring socioeconomic status in multicountry studies: results from the eight-country MAL-ED study.

25-hydroxy vitamin D levels are associated with childhood asthma in a population-based study in Peru.

Catch-up growth occurs after diarrhea in early childhood.

Global analysis of critical care burden.

Lung ultrasound for the diagnosis of pneumonia in adults: a systematic review and meta-analysis.

Prevalence, clinical profile, iron status, and subject-specific traits for excessive erythrocytosis in andean adults living permanently at 3,825 meters above sea level.

Developing a reference of normal lung sounds in healthy Peruvian children.

Humidity and gravimetric equivalency adjustments for nephelometer-based particulate matter measurements of emissions from solid biomass fuel use in cookstoves.

Beyond birth-weight: early growth and adolescent blood pressure in a Peruvian population.

Multilevel competing risks in the evaluation of nosocomial infections: time to move on from proportional hazards and even from hazards altogether.

A review of the global burden, novel diagnostics, therapeutics, and vaccine targets for cryptosporidium.

Behavioral attitudes and preferences in cooking practices with traditional open-fire stoves in Peru, Nepal, and Kenya: implications for improved cookstove interventions.

Disease surveillance methods used in the 8-site MAL-ED cohort study.

Modeling environmental influences on child growth in the MAL-ED cohort study: opportunities and challenges.

Depressive Mood Among Within-Country Migrants in Periurban Shantytowns of Lima, Peru.

Lack of association between chronic exposure to biomass fuel smoke and markers of right ventricular pressure overload at high altitude.

Vitamin D and COPD: who benefits from supplementation?

Management of NCD in low- and middle-income countries.

Establishment of a prospective cohort of mechanically ventilated patients in five intensive care units in Lima, Peru: protocol and organisational characteristics of participating centres.

Association Between Serum 25-Hydroxy Vitamin D Levels and Blood Pressure Among Adolescents in Two Resource-Limited Settings in Peru.

Relationship between daily exposure to biomass fuel smoke and blood pressure in high-altitude Peru.

Building a platform for translational research in chronic noncommunicable diseases to address population health: lessons from NHLBI supported CRONICAS in Peru.

Association between serum concentrations of hypoxia inducible factor responsive proteins and excessive erythrocytosis in high altitude Peru.

Type 2 diabetes and cardiac autonomic neuropathy screening using dynamic pupillometry.

Lung ultrasound for the diagnosis of pneumonia in children: a meta-analysis.

Sleep Disordered Breathing in Four Resource-Limited Settings in Peru: Prevalence, Risk Factors, and Association with Chronic Diseases.

Prevalence of chronic obstructive pulmonary disease and variation in risk factors across four geographically diverse resource-limited settings in Peru.

Agreement Between the World Health Organization Algorithm and Lung Consolidation Identified Using Point-of-Care Ultrasound for the Diagnosis of Childhood Pneumonia by General Practitioners.

Noninvasive Assessment of Excessive Erythrocytosis as a Screening Method for Chronic Mountain Sickness at High Altitude.

Agreement Between Cardiovascular Disease Risk Scores in Resource-Limited Settings: Evidence from 5 Peruvian Sites.

Protocols and Hospital Mortality in Critically Ill Patients: The United States Critical Illness and Injury Trials Group Critical Illness Outcomes Study.

Burden of chronic kidney disease in resource-limited settings from Peru: a population-based study.

Low correlation between household carbon monoxide and particulate matter concentrations from biomass-related pollution in three resource-poor settings.

Contribution of modifiable risk factors for hypertension and type-2 diabetes in Peruvian resource-limited settings.

Distribution of Short-Term and Lifetime Predicted Risks of Cardiovascular Diseases in Peruvian Adults.

Global Noncommunicable Disease Research: Opportunities and Challenges.

Association Between Adherence to the Mediterranean Diet and Asthma in Peruvian Children.

Childhood pneumonia increases risk for chronic obstructive pulmonary disease: the COPDGene study.

Chronic exposure to biomass fuel smoke and markers of endothelial inflammation.

Association of Roadway Proximity with Indoor Air Pollution in a Peri-Urban Community in Lima, Peru.

Urbanization and Daily Exposure to Biomass Fuel Smoke Both Contribute to Chronic Bronchitis Risk in a Population with Low Prevalence of Daily Tobacco Smoking.

Metabolic Abnormalities Are Common among South American Hispanics Subjects with Normal Weight or Excess Body Weight: The CRONICAS Cohort Study.

The Gamma Gap and All-Cause Mortality.

Spatial distribution of individuals with symptoms of depression in a periurban area in Lima: an example from Peru.

Urbanisation but not biomass fuel smoke exposure is associated with asthma prevalence in four resource-limited settings.

Differences between absolute and predicted values of forced expiratory volumes to classify ventilatory impairment in chronic obstructive pulmonary disease.

Modelling subject-specific childhood growth using linear mixed-effect models with cubic regression splines.

Global Health Education in Pulmonary and Critical Care Medicine Fellowships.

Obesity and its Relation With Diabetes and Hypertension: A Cross-Sectional Study Across 4 Geographical Regions.

Characteristics Associated With Antihypertensive Treatment and Blood Pressure Control: A Population-Based Follow-Up Study in Peru.

The Relationship Between Socioeconomic Status and CV Risk Factors: The CRONICAS Cohort Study of Peruvian Adults.

Towards sustainable partnerships in global health: the case of the CRONICAS Centre of Excellence in Chronic Diseases in Peru.

Increased Cardiometabolic Risk and Worsening Hypoxemia at High Altitude.

Perspectives from NHLBI Global Health Think Tank Meeting for Late Stage (T4) Translation Research.

Dark Adaptation at High Altitude: An Unexpected Pupillary Response to Chronic Hypoxia in Andean Highlanders.

Epidemiology and Impact of Campylobacter Infection in Children in 8 Low-Resource Settings: Results From the MAL-ED Study.

Defining ICU Structure and Process: Working Toward a Worldwide Agenda.

Development and Validation of a Simple Risk Score for Undiagnosed Type 2 Diabetes in a Resource-Constrained Setting.

Empirical Antifungal Therapy in Critically Ill Patients With Sepsis: Another Case of Less Is More in the ICU.

Geographical variation in the progression of type 2 diabetes in Peru: The CRONICAS Cohort Study.

Managing threats to respiratory health in urban slums.

Socioeconomic status and COPD among low- and middle-income countries.

Pulmonary function and adverse cardiovascular outcomes: Can cardiac function explain the link?

Identifying biomarkers for asthma diagnosis using targeted metabolomics approaches.

Impact of urbanisation and altitude on the incidence of, and risk factors for, hypertension.

Perceptions of Improved Biomass and Liquefied Petroleum Gas Stoves in Puno, Peru: Implications for Promoting Sustained and Exclusive Adoption of Clean Cooking Technologies.

Cross-Sectional Comparison of Sleep-Disordered Breathing in Native Peruvian Highlanders and Lowlanders.

Whole Blood Cytokine Response to Local Traffic-Related Particulate Matter in Peruvian Children With and Without Asthma.

Do hospitals need oncological critical care units?

Stick to What You Know: Do Visiting Intensivists Worsen Outcomes?

Free 25(OH)D concentrations are associated with atopy and lung function in children with asthma.

Associations between serum 25(OH)D concentrations and prevalent asthma among children living in communities with differing levels of urbanization: a cross-sectional study.

Lung ultrasound as a diagnostic tool for radiographically-confirmed pneumonia in low resource settings.

Clean Fuels to Reduce Household Air Pollution and Improve Health. Still Hoping to Answer Why and How.

Cardiometabolic correlates of sleep disordered breathing in Andean highlanders.

Disparities in dietary intake and physical activity patterns across the urbanization divide in the Peruvian Andes.

Association between chronic conditions and health-related quality of life: differences by level of urbanization in Peru.

Low cigarette smoking prevalence in peri-urban Peru: results from a population-based study of tobacco use by self-report and urine cotinine.

Urbanization, mainly rurality, but not altitude is associated with dyslipidemia profiles.

Validation of the St. George's Respiratory Questionnaire in Nepal.

High-Dose Versus Low-Dose Systemic Steroids in the Treatment of Acute Exacerbations of Chronic Obstructive Pulmonary Disease: Systematic Review.

A Survey of Corticosteroid Dosing for Exacerbations of Chronic Obstructive Pulmonary Disease Requiring Assisted Ventilation.

Assessing Exposure to Household Air Pollution: A Systematic Review and Pooled Analysis of Carbon Monoxide as a Surrogate Measure of Particulate Matter.

Effects of a liquefied petroleum gas stove intervention on pollutant exposure and adult cardiopulmonary outcomes (CHAP): study protocol for a randomized controlled trial.

Serum folate concentrations, asthma, atopy, and asthma control in Peruvian children.

Risk score for first-screening of prevalent undiagnosed chronic kidney disease in Peru: the CRONICAS-CKD risk score.

Dynamic prediction in functional concurrent regression with an application to child growth.

Oxygen Exposure Resulting in Arterial Oxygen Tensions Above the Protocol Goal Was Associated With Worse Clinical Outcomes in Acute Respiratory Distress Syndrome.

Association between Household Air Pollution Exposure and Chronic Obstructive Pulmonary Disease Outcomes in 13 Low- and Middle-Income Country Settings.

Low prevalence of ideal cardiovascular health in Peru.

Asthma and Allergic Disorders in Uganda: A Population-Based Study Across Urban and Rural Settings.

Fast covariance estimation for sparse functional data.

Trajectories of body mass index and waist circumference in four Peruvian settings at different level of urbanisation: the CRONICAS Cohort Study.

Novel metrics for growth model selection.

Patterns of Body Composition Relating to Chronic Respiratory Diseases Among Adults in Four Resource-Poor Settings in Peru.

Using data from multiple studies to develop a child growth correlation matrix.

Exhaled Nitric Oxide is Not a Biomarker for Pulmonary Tuberculosis.

Pneumococcal Conjugate Vaccine impact assessment in Bangladesh.

Validation of the Saint George's Respiratory Questionnaire in Uganda.

Environmental exposures and systemic hypertension are risk factors for decline in lung function.

Epidemiology and risk factors of asthma-chronic obstructive pulmonary disease overlap in low- and middle-income countries.

Building a Prediction Model for Radiographically Confirmed Pneumonia in Peruvian Children: From Symptoms to Imaging.

Effectiveness-implementation of COPD case finding and self-management action plans in low- and middle-income countries: global excellence in COPD outcomes (GECo) study protocol.

An evaluation of the Fondo de Inclusión Social Energético program to promote access to liquefied petroleum gas in Peru.

Ambient Air Pollution and Variation in Multiple Domains of Asthma Morbidity among Peruvian Children.

Association between exhaled carbon monoxide and asthma outcomes in Peruvian children.

Automatic classification of pediatric pneumonia based on lung ultrasound pattern recognition.

The HOMA-IR Performance to Identify New Diabetes Cases by Degree of Urbanization and Altitude in Peru: The CRONICAS Cohort Study.

Urban-Rural Disparities in Chronic Obstructive Pulmonary Disease Management and Access in Uganda.

Challenges to hypertension and diabetes management in rural Uganda: a qualitative study with patients, village health team members, and health care professionals.

Human Immunodeficiency Virus Diagnosis After a Syphilis, Gonorrhea, or Repeat Diagnosis Among Males Including non-Men Who Have Sex With Men: What Is the Incidence?

A secondary analysis examining the concordance of self-perception of weight and actual measurement of body fat percentage: The CRONICAS Cohort Study.

Sedation practices and clinical outcomes in mechanically ventilated patients in a prospective multicenter cohort.

The health and social implications of household air pollution and respiratory diseases.

Low Body Mass Index Is Associated with Higher Odds of COPD and Lower Lung Function in Low- and Middle-Income Countries.

Upright posture increases oxyhemoglobin saturation in Peruvian highlanders.

Urbanization and Altitude Are Associated with Low Kidney Function in Peru.

Assessment of lung function in successfully treated tuberculosis reveals high burden of ventilatory defects and COPD.

Chest radiograph reading panel performance in a Bangladesh pneumococcal vaccine effectiveness study.

Global Health-related Training Opportunities. A National Survey of Pulmonary and Critical Care Medicine Fellowship Programs.

A Systematic Review to Evaluate the Association between Clean Cooking Technologies and Time Use in Low- and Middle-Income Countries.

Developing an Advanced PM Exposure Model in Lima, Peru.

Household food insecurity is associated with asthma control in Peruvian children living in a resource-poor setting.

Training and standardization of general practitioners in the use of lung ultrasound for the diagnosis of pediatric pneumonia.

Analysis of dietary patterns and cross-sectional and longitudinal associations with hypertension, high BMI and type 2 diabetes in Peru.

Regression from prediabetes to normal glucose levels is more frequent than progression towards diabetes: The CRONICAS Cohort Study.

What have we learnt from studies on the association between urbanisation and asthma prevalence?

Prevalence of chronic respiratory disease in urban and rural Uganda.

The use of bluetooth low energy Beacon systems to estimate indirect personal exposure to household air pollution.

Lack of an Association Between Household Air Pollution Exposure and Previous Pulmonary Tuberculosis.

Challenges in the diagnosis of paediatric pneumonia in intervention field trials: recommendations from a pneumonia field trial working group.

Pulse oximetry in paediatric primary care in low-income and middle-income countries.

Association between hospital mortality and inspiratory airway pressures in mechanically ventilated patients without acute respiratory distress syndrome: a prospective cohort study.

Risk factors for the development of acute respiratory distress syndrome in mechanically ventilated adults in Peru: a multicenter observational study.

Comparison of next-generation portable pollution monitors to measure exposure to PM from household air pollution in Puno, Peru.

Premature, Opportune, and Delayed Weaning in Mechanically Ventilated Patients: A Call for Implementation of Weaning Protocols in Low- and Middle-Income Countries.

The role of epigenetics in respiratory health in urban populations in low and middle-income countries.

Population-based incidence and serotype distribution of invasive pneumococcal disease prior to introduction of conjugate pneumococcal vaccine in Bangladesh.

Nitrogen dioxide exposures from biomass cookstoves in the Peruvian Andes.

Mean Airway Pressure As a Predictor of 90-Day Mortality in Mechanically Ventilated Patients.

Effects of high altitude on respiratory rate and oxygen saturation reference values in healthy infants and children younger than 2 years in four countries: a cross-sectional study.

Correction: The use of bluetooth low energy Beacon systems to estimate indirect personal exposure to household air pollution.

Dietary patterns and asthma among Peruvian children and adolescents.

Design and conduct of facility-based surveillance for severe childhood pneumonia in the Household Air Pollution Intervention Network (HAPIN) trial.

Air Pollutant Exposure and Stove Use Assessment Methods for the Household Air Pollution Intervention Network (HAPIN) Trial.

Design and Rationale of the Biomarker Center of the Household Air Pollution Intervention Network (HAPIN) Trial.

Design and Rationale of the HAPIN Study: A Multicountry Randomized Controlled Trial to Assess the Effect of Liquefied Petroleum Gas Stove and Continuous Fuel Distribution.

Protecting children in low-income and middle-income countries from COVID-19.

Chronic Obstructive Pulmonary Disease Prevalence and Associated Factors in a Setting of Well-Controlled HIV, A Cross-Sectional Study.

Indoor air pollution concentrations and cardiometabolic health across four diverse settings in Peru: a cross-sectional study.

Lung Ultrasound in Cardiac Intensive Care: More Than Just LUCK?

Size distribution and lung-deposited doses of particulate matter from household exposure to biomass smoke.

Beyond cost: Exploring fuel choices and the socio-cultural dynamics of liquefied petroleum gas stove adoption in Peru.

Cross-validation of biomonitoring methods for polycyclic aromatic hydrocarbon metabolites in human urine: Results from the formative phase of the Household Air Pollution Intervention Network (HAPIN) trial in India.

Household air pollution exposure and associations with household characteristics among biomass cookstove users in Puno, Peru.

Effectiveness of the 10-valent pneumococcal conjugate vaccine against radiographic pneumonia among children in rural Bangladesh: A case-control study.

Designing a comprehensive behaviour change intervention to promote and monitor exclusive use of liquefied petroleum gas stoves for the Household Air Pollution Intervention Network (HAPIN) trial.

Exploring the impact of a liquefied petroleum gas intervention on time use in rural Peru: A mixed methods study on perceptions, use, and implications of time savings.

Gaps in COPD Guidelines of Low- and Middle-Income Countries: A Systematic Scoping Review.

Obesity markers for the prediction of incident type 2 diabetes mellitus in resource-poor settings: The CRONICAS Cohort Study.

Factors associated with head circumference and indices of cognitive development in early childhood.

Nitrogen dioxide exposures from LPG stoves in a cleaner-cooking intervention trial.

A Novel Case-Finding Instrument for Chronic Obstructive Pulmonary Disease in Low- and Middle-Income Country Settings.

A Risk Assessment Tool for Resumption of Research Activities During the COVID-19 Pandemic.

Exposure contrasts associated with a liquefied petroleum gas (LPG) intervention at potential field sites for the multi-country household air pollution intervention network (HAPIN) trial in India: results from pilot phase activities in rural Tamil Nadu.

Effects of a Household Air Pollution Intervention with Liquefied Petroleum Gas on Cardiopulmonary Outcomes in Peru. A Randomized Controlled Trial.

Pragmatic Recommendations for Safety while Caring for Hospitalized Patients with COVID-19 in Low- and Middle-Income Countries.

Pragmatic Recommendations for Therapeutics of Hospitalized COVID-19 Patients in Low- and Middle-Income Countries.

Use of liquefied petroleum gas in Puno, Peru: Fuel needs under conditions of free fuel and near-exclusive use.

Development and Validity Assessment of a Chronic Obstructive Pulmonary Disease Knowledge Questionnaire in Low- and Middle-Income Countries.

Higher interleukin-6 levels and changes in transforming growth factor-β are associated with lung impairment in pulmonary tuberculosis.

Pragmatic Recommendations for the Management of Acute Respiratory Failure and Mechanical Ventilation in Patients with COVID-19 in Low- and Middle-Income Countries.

Association between Blood Pressure and HIV Status in Rural Uganda: Results of Cross-Sectional Analysis.

Training physicians in India to interpret pediatric chest radiographs according to World Health Organization research methodology.

Genome-wide association study of asthma, total IgE, and lung function in a cohort of Peruvian children.

Effectiveness of low-dose theophylline for the management of biomass-associated COPD (LODOT-BCOPD): study protocol for a randomized controlled trial.

Household air pollution and blood markers of inflammation: A cross-sectional analysis.

24-hour ambulatory blood pressure monitoring and hypertension related risk among HIV-positive and HIV-negative individuals: cross sectional study findings from rural Uganda.

Ultrasound Core Laboratory for the Household Air Pollution Intervention Network Trial: Standardized Training and Image Management for Field Studies Using Portable Ultrasound in Fetal, Lung, and Vascular Evaluations.

Differences between cigarette smoking and biomass smoke exposure: An in silico comparative assessment of particulate deposition in the lungs.

A risk assessment tool for resumption of research activities during the COVID-19 pandemic for field trials in low resource settings.

Inequities in air pollution exposure and gaps in air quality monitoring.

Altered IgA Response to Gut Bacteria Is Associated with Childhood Asthma in Peru.

Acceptability of patient-centered hypertension education delivered by community health workers among people living with HIV/AIDS in rural Uganda.

Multimorbidity at sea level and high-altitude urban and rural settings: The CRONICAS Cohort Study.

Characterization of Air Pollution Exposures as Risk Factors for Tuberculosis Infection.

Impact of national introduction of ten-valent pneumococcal conjugate vaccine on invasive pneumococcal disease in Bangladesh: Case-control and time-trend studies.

The Effectiveness of High-Flow Nasal Cannula in Coronavirus Disease 2019 Pneumonia: A Retrospective Cohort Study.

Resources and Geographic Access to Care for Severe Pediatric Pneumonia in Four Resource-limited Settings.

Defining hypoxaemia from pulse oximeter measurements of oxygen saturation in well children at low altitude in Bangladesh: an observational study.

LPG stove and fuel intervention among pregnant women reduce fine particle air pollution exposures in three countries: Pilot results from the HAPIN trial.

Previous tuberculosis disease as a risk factor for chronic obstructive pulmonary disease: a cross-sectional analysis of multicountry, population-based studies.

Fidelity and Adherence to a Liquefied Petroleum Gas Stove and Fuel Intervention during Gestation: The Multi-Country Household Air Pollution Intervention Network (HAPIN) Randomized Controlled Trial.

High-sensitivity C-reactive protein and all-cause mortality in four diverse populations: The CRONICAS Cohort Study.

Discriminative Accuracy of Chronic Obstructive Pulmonary Disease Screening Instruments in 3 Low- and Middle-Income Country Settings.

Association between personal exposure to household air pollution and gestational blood pressure among women using solid cooking fuels in rural Tamil Nadu, India.

Population-based stroke incidence estimates in Peru: Exploratory results from the CRONICAS cohort study.

The authors reply.

Facing the Realities of Pragmatic Design Choices in Environmental Health Studies: Experiences from the Household Air Pollution Intervention Network Trial.

Cost-Accuracy Analysis of Chronic Obstructive Pulmonary Disease Screening in Low- and Middle-Income Countries.

Living at High Altitude and COVID-19 Mortality in Peru.

Household Air Pollution Concentrations after Liquefied Petroleum Gas Interventions in Rural Peru: Findings from a One-Year Randomized Controlled Trial Followed by a One-Year Pragmatic Crossover Trial.

Effects of a Liquefied Petroleum Gas Stove Intervention on Gestational Blood Pressure: Intention-to-Treat and Exposure-Response Findings From the HAPIN Trial.

Comparing Prone Positioning Use in COVID-19 Versus Historic Acute Respiratory Distress Syndrome.

Effectiveness of the 10-valent pneumococcal conjugate vaccine on pediatric pneumonia confirmed by ultrasound: a matched case-control study.

Cross-sectional analysis of the association between personal exposure to household air pollution and blood pressure in adult women: Evidence from the multi-country Household Air Pollution Intervention Network (HAPIN) trial.

Home-Based Respiratory Physiotherapy and Telephone-Based Psychological Support for COVID-19 Survivors in Peru: Protocol for a Randomized Controlled Trial.

Exposure Contrasts of Pregnant Women during the Household Air Pollution Intervention Network Randomized Controlled Trial.

Liquefied Petroleum Gas or Biomass for Cooking and Effects on Birth Weight.

Tuberculosis, Wildfires, and Case-Crossover Studies: An Epidemiological Trifecta?

Association Between Depressive Symptoms and Cardiac Structure and Function in a Peruvian Population.