RT Journal Article SR Electronic T1 Drs Rolles and Collins comment JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 417 OP 417 DO 10.1136/adc.61.4.417-b VO 61 IS 4 YR 1986 UL http://adc.bmj.com/content/61/4/417.4.abstract AB