Famed Medical Marijuana Doctor Calls For Making Concentrates Illegal July 5, 2018 AggregatedNews Industry People, Policy & Legal 0 Comments As the author of Cannabis for Chronic Pain, Boulder-based Dr. Rav Ivker is among the country's best-known and most respected advocates on behalf of medical marijuana. But he's wary about weed consumption in a number of circumstances, warns that pot addiction… Read More→