Recognized as a sleep medicine specialist by the College of Physicians and Surgeons of Ontario, Dr. Chan is a fellow of the World Sleep Society. He is a RCPSC specialist in Internal Medicine and Critical Care Medicine. Post-graduate training was at the University of Toronto and Saint Louis University in USA. Dr. Chan holds board certifications by the American Board of Internal Medicine in Internal Medicine, Pulmonary Disease, and Critical Care Medicine. He is an active staff physician at William Osler Health System, and an assistant Clinical Professor (adjunct) in the Division of Critical Care at McMaster University.