PT - JOURNAL ARTICLE ED - , TI - Answers DP - 2005 Jun 01 TA - Archives of disease in childhood - Education & practice edition PG - ep24--ep24 VI - 90 IP - 1 4099 - http://ep.bmj.com/content/90/1/ep24.short 4100 - http://ep.bmj.com/content/90/1/ep24.full SO - Arch Dis Child Educ Pract Ed2005 Jun 01; 90