RT Journal A1 Coulehan J T1 THe rock JF JAMA JO JAMA YR 2012 FD November 21 VO 308 IS 19 SP 1955 OP 1955 DO 10.1001/jama.2012.13267 UL http://dx.doi.org/10.1001/jama.2012.13267 AB