Dr Peter Grinspoon is a primary care physician at Massachusetts General Hospital, an Instructor at Harvard Medical School and a certified Health and Wellness Coach. He is a board member of the advocacy group Doctors For Cannabis Regulation. He is a Contributing Editor to Harvard Health Publications. He spent two years as an Associate Director of the Massachusetts Physician Health Service helping physicians with addiction and mental health issues. He is the author of the memoir ‘Free Refills: A Doctor Confronts His Addiction’. He graduated with an M.A. in Philosophy with honours from Swarthmore College. He then spent five years as a Campaign Director for the environmental group Greenpeace before entering medical school at Boston University School of Medicine, where he graduated with honours. He completed his residency at Harvard’s Brigham and Women’s Hospital, in the primary care program.