RT Journal Article SR Electronic T1 The Medical Annual JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 231 OP 232 DO 10.1136/adc.36.186.231-c VO 36 IS 186 YR 1961 UL http://adc.bmj.com/content/36/186/231.4.abstract AB