RT Journal Article SR Electronic T1 Nelson. Textbook of Pediatrics. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 385 OP 385 DO 10.1136/adc.76.4.385d VO 76 IS 4 A1 ROBERT A F BELL YR 1997 UL http://adc.bmj.com/content/76/4/385.19.abstract AB