AU - Campbell M TI - HAnds PT - JOUR DP - 2013 TA - JAMA pages = {324}, VI - 309 IP - 4 AID - 10.1001/jama.2012.14132 [doi] 4100 - http://dx.doi.org/10.1001/jama.2012.14132 SO - JAMA January 23, 2013 309(4):324