RT Journal T1 PIcture of the month—diagnosis JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 2009 FD December 1 VO 163 IS 12 SP 1158 OP 1158 DO 10.1001/archpediatrics.2009.221-b UL http://dx.doi.org/10.1001/archpediatrics.2009.221-b AB