TY - JOUR T1 - With commentary JF - Archives of Disease in Childhood JO - Arch Dis Child SP - 928 LP - 928 DO - 10.1136/adc.55.12.928 VL - 55 IS - 12 AU - J A Walker-Smith Y1 - 1980/12/01 UR - http://adc.bmj.com/content/55/12/928.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -