AU - Estellat C, Ravaud P TI - Lack of head-to-head trials and fair control arms: Randomized controlled trials of biologic treatment for rheumatoid arthritis PT - JOUR DP - 2012 TA - Archives of Internal Medicine pages = {237-244}, VI - 172 IP - 3 AID - 10.1001/archinternmed.2011.1209 [doi] 4100 - http://dx.doi.org/10.1001/archinternmed.2011.1209 SO - Archives of Internal Medicine February 13, 2012 172(3):237