TI - FOrfar and arneil's textbook of pediatrics PT - JOUR DP - 1999 TA - Archives of Pediatrics & Adolescent Medicine pages = {897}, VI - 153 IP - 8 AID - 10.1001/archpedi.153.8.897 [doi] 4100 - http://dx.doi.org/10.1001/archpedi.153.8.897 SO - Archives of Pediatrics & Adolescent Medicine August 1, 1999 153(8):897