RT Journal A1 Fisher RS T1 LAw and medicine JF JAMA JO JAMA YR 1969 FD January 27 VO 207 IS 4 SP 817 OP 818 DO 10.1001/jama.1969.03150170121041 UL http://dx.doi.org/10.1001/jama.1969.03150170121041 AB