TI - NOvember 24, 1999 PT - JOUR DP - 1999 TA - JAMA pages = {1979-1980}, VI - 282 IP - 20 AID - 10.1001/jama.282.20.1979 [doi] 4100 - http://dx.doi.org/10.1001/jama.282.20.1979 SO - JAMA November 24, 1999 282(20):1979