PT - JOURNAL ARTICLE ED - , TI - Rule 31: Review the world literature fortnightly DP - 2004 Jan 01 TA - Archives of Disease in Childhood PG - 81--81 VI - 89 IP - 1 4099 - http://adc.bmj.com/content/89/1/81.2.short 4100 - http://adc.bmj.com/content/89/1/81.2.full SO - Arch Dis Child2004 Jan 01; 89