RT Journal Article SR Electronic JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 291 OP 291 DO 10.1136/adc.76.3.291 VO 76 IS 3 YR 1997 UL http://adc.bmj.com/content/76/3/291.abstract AB