RT Journal A1 Poirier S T1 LIterature and medicine JF JAMA JO JAMA YR 1989 FD November 10 VO 262 IS 18 SP 2522 OP 2522 DO 10.1001/jama.1989.03430180054012 UL http://dx.doi.org/10.1001/jama.1989.03430180054012 AB