TI - SElected abstracts PT - JOUR DP - 1979 TA - JAMA pages = {1308C-1314}, VI - 242 IP - 12 AID - 10.1001/jama.1979.03300120061036 [doi] 4100 - http://dx.doi.org/10.1001/jama.1979.03300120061036 SO - JAMA September 21, 1979 242(12):1308C