RT Journal Article SR Electronic T1 Answers From questions on page 24 JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 40 OP 40 DO 10.1136/adc.2010.200485a VO 96 IS 1 A1 Helen Williams YR 2011 UL http://ep.bmj.com/content/96/1/40.abstract AB