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 91 OP 91 DO 10.1136/adc.82.1.91 VO 82 IS 1 YR 2000 UL http://adc.bmj.com/content/82/1/91.abstract AB