TI - REferences and reviews PT - JOUR DP - 1969 TA - JAMA pages = {770-793}, VI - 207 IP - 4 AID - 10.1001/jama.1969.03150170096040 [doi] 4100 - http://dx.doi.org/10.1001/jama.1969.03150170096040 SO - JAMA January 27, 1969 207(4):770