TI - DOmestic abstracts PT - JOUR DP - 1989 TA - JAMA pages = {404-408}, VI - 262 IP - 3 AID - 10.1001/jama.1989.03430030092043 [doi] 4100 - http://dx.doi.org/10.1001/jama.1989.03430030092043 SO - JAMA July 21, 1989 262(3):404