RT Journal A1 McGuffin A T1 FLags JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 2012 FD February 1 VO 166 IS 2 SP 163 OP 163 DO 10.1001/archpediatrics.2011.1166 UL http://dx.doi.org/10.1001/archpediatrics.2011.1166 AB