Peter GrinspoonPeter Grinspoon, M.D., is a primary care physician and cannabis specialist at Massachusetts General Hospital and an instructor in medicine at Harvard Medical School. He is a certified physician wellness coach as well as a board membe of the advocacy group Doctors for Cannabis Regulation. Dr. Grinspoon is a widely recognized expert on cannabis science and drug policy who regularly appears as an expert on national television and radio programs. Grinspoon's Harvard Health articles have reached tens of millions of readers, been widely referenced in the national media, and been cited in congressional testimony. He is the author of the groundbreaking memoir Free Refills: A Doctor Confronts His Addiction. Read More Read Less