TI - FEbruary 10, 1999 PT - JOUR DP - 1999 TA - JAMA pages = {581-582}, VI - 281 IP - 6 AID - 10.1001/jama.281.6.581 [doi] 4100 - http://dx.doi.org/10.1001/jama.281.6.581 SO - JAMA February 10, 1999 281(6):581