TI - JAnuary 13, 1999 PT - JOUR DP - 1999 TA - JAMA pages = {203-204}, VI - 281 IP - 2 AID - 10.1001/jama.281.2.203 [doi] 4100 - http://dx.doi.org/10.1001/jama.281.2.203 SO - JAMA January 13, 1999 281(2):203