RT Journal T1 ABout this journal JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 2009 FD April 6 VO 163 IS 4 SP 294 OP 294 DO 10.1001/archpedi.163.4.294 UL http://dx.doi.org/10.1001/archpedi.163.4.294 AB