William Osler (1849–1919) was a renowned physician and medical historian and is regarded as the most brilliant and influential teacher of medicine in his day. He was professor at McGill, the University of Pennsylvania, Johns Hopkins, and Oxford. His many medical observations include those on blood platelets and on the abnormally high red blood cell count in polycythemia. He wrote The Principles and Practice of Medicine (1892), one of the most prestigious medical textbooks in modern times, often revised, and A Concise History of Medicine (1919). Walt Whitman was one of his most famous patients.
Conrad Fischer, MD, is Director of Educational Development for the Department of Medicine at Jamaica Hospital Medical Center in New York City. Jamaica Hospital is a robust window on the world of medicine. Dr. Fischer is also Chairman of Medicine for Kaplan Medical, teaching USMLE Steps 1, 2, and 3, Internal Medicine Board Review and Attending Recertification, and USMLE Step 1 Physiology. Dr. Fischer is Associate Professor of Physiology, Pharmacology, and Medicine at Touro College of Osteopathic Medicine in New York City.