TI - SElected abstracts PT - JOUR DP - 1979 TA - JAMA pages = {2659-2662}, VI - 241 IP - 24 AID - 10.1001/jama.1979.03290500059035 [doi] 4100 - http://dx.doi.org/10.1001/jama.1979.03290500059035 SO - JAMA June 15, 1979 241(24):2659