AU - Coulehan J TI - THe rock PT - JOUR DP - 2012 TA - JAMA pages = {1955}, VI - 308 IP - 19 AID - 10.1001/jama.2012.13267 [doi] 4100 - http://dx.doi.org/10.1001/jama.2012.13267 SO - JAMA November 21, 2012 308(19):1955