RT Journal A1 Butka B T1 DO not resuscitate JF JAMA JO JAMA YR 2012 FD October 24 VO 308 IS 16 SP 1613 OP 1613 DO 10.1001/2012.jama.11596 UL http://dx.doi.org/10.1001/2012.jama.11596 AB