Kleykamp Bethea A, Heishman Stephen J
Nicotine Psychopharmacology Section, National Institute on Drug Abuse, National Institutes of Health, 251 Bayview Blvd, Ste 200, Baltimore, MD 21224, USA.
JAMA. 2011 Aug 24;306(8):876-7. doi: 10.1001/jama.2011.1221.