TI - JUly 28, 1999 PT - JOUR DP - 1999 TA - JAMA pages = {399-400}, VI - 282 IP - 4 AID - 10.1001/jama.282.4.399 [doi] 4100 - http://dx.doi.org/10.1001/jama.282.4.399 SO - JAMA July 28, 1999 282(4):399