RT Journal T1 RAdiological case of the month JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 2001 FD April 1 VO 155 IS 4 SP 522 OP 522 DO 10.1001/archpedi.155.4.521 UL http://dx.doi.org/10.1001/archpedi.155.4.521 AB