RT Journal Article SR Electronic T1 Rule 31: Review the world literature fortnightly JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 81 OP 81 VO 89 IS 1 YR 2004 UL http://adc.bmj.com/content/89/1/81.2.abstract AB