TI - SElected abstracts PT - JOUR DP - 1979 TA - JAMA pages = {769-772}, VI - 242 IP - 8 AID - 10.1001/jama.1979.03300080063041 [doi] 4100 - http://dx.doi.org/10.1001/jama.1979.03300080063041 SO - JAMA August 24, 1979 242(8):769