FREDERIK DAGNAES-HANSEN is DVM and received his Ph.D. degree in laboratory animal science from the Royal Veterinary and Agricultural University, Copenhagen, Denmark. He is presently Associate Professor at the Department of Biomedicin, Aarhus University, Faculty of Health Science. His research interests include rodent models in cancer research, other xenotransplantation models of human diseases, and viral- nonviral methods of gene transfer.