RT Journal Article SR Electronic T1 Oxford handbook of paediatrics JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 249 OP 249 VO 94 IS 3 A1 C K Bird YR 2009 UL http://adc.bmj.com/content/94/3/249.1.abstract AB