An Exploration of Site Effects in a Multisite Trial of OROS-Methylphenidate for Smokers with Attention Deficit/Hyperactivity Disorder
The American Journal of Drug and Alcohol Abuse | August 22, 2011 | Volume: 37 | Issue: 5 | Pages: 392-399
10.3109/00952990.2011.596979
| PMID 21854282