" Every patient who was prescribed the drug stood a chance of soon needing it every day. These people were willing to pay cash. They never missed an appointment. If diagnosis wasn’t your concern, a clinic was a low-overhead operation: a rented building, a few waiting rooms, some office staff. And bouncers. These clinics did require bouncers. "

― Sam Quinones , Dreamland: The True Tale of America's Opiate Epidemic