Dr. Paul L. Kimmel received his AB from Yale University and his M.D. from the New York University School of Medicine. He trained in internal medicine and nephrology at Bellevue Hospital in New York City and the Hospital of the University of Pennsylvania in Philadelphia. Since 1983 he has served on the faculty of the George Washington University Medical Center, where he is currently Professor of Medicine and Director of the Division of Renal Diseases and Hypertension, Department of Medicine. He has served on the Editorial Boards of Blood Purification and the American Journal of Kidney Disease, and has recently finished service on the Editorial Board of the Journal of the American Society of Nephrology, the premier nephrology journal. His research interests have included sleep disorders in patients with end-stage renal disease, zinc metabolism and its association with mineral and vitamin D metabolism in chronic renal disease, the pathogenesis and therapy of HIV-associated renal diseases, psychological adaptation to chronic renal disease, and cytokine biology in dialysis patients. He has investigated the association of hematocrit and circulating cytokines in ESRD patients treated with erythropoietin. In addition, working with Federal Government and private sector collaborators, he has performed analyses of the use of erythropoietin in the US ESRD program. He has a long-standing interest in the assessment of quality of life in hemodialysis patients, and its association with biological factors. He has been an invited speaker at universities and at medical meetings for many years.