Robert G. Andrews, MD, is attending physician at Seattle Childrens Hospital and associate professor in the Division of Pediatric Hematology/Oncology at the University of Washington School of Medicine. He is associate member of Fred Hutchinson Cancer Research Center (FHCRC) in the Clinical Research Division. Dr. Andrews research involves studying the role of natural killer cells in promoting fetal hematopoietic stem cell transplantation and preventing graft versus host disease. Additional research interests include hematopoietic stem cell and transplantation biology as well as embryonic stem cellbased therapies. His laboratory is also studying novel nonhuman primate embryonic stem cell (ESC) lines to characterize the differentiation to hematopoietic stem cells (HSC) and to develop strategies for the use of ESC-derived HSCs for transplantation.