TI - SElected abstracts PT - JOUR DP - 1979 TA - JAMA pages = {1087-1094}, VI - 242 IP - 10 AID - 10.1001/jama.1979.03300100059037 [doi] 4100 - http://dx.doi.org/10.1001/jama.1979.03300100059037 SO - JAMA September 7, 1979 242(10):1087