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 188 OP 188 DO 10.1136/adc.84.2.188 VO 84 IS 2 YR 2001 UL http://adc.bmj.com/content/84/2/188.abstract AB