TI - TRial registration required PT - JOUR DP - 2006 TA - Archives of Pediatrics & Adolescent Medicine pages = {1012}, VI - 160 IP - 10 AID - 10.1001/archpedi.160.10.1012 [doi] 4100 - http://dx.doi.org/10.1001/archpedi.160.10.1012 SO - Archives of Pediatrics & Adolescent Medicine October 1, 2006 160(10):1012