TY - JOUR T1 - Primer of Gastrointestinal Fibreoptic Endoscopy JF - Gut JO - Gut SP - 354 LP - 354 DO - 10.1136/gut.23.4.354-a VL - 23 IS - 4 AU - A G Vallon Y1 - 1982/04/01 UR - http://gut.bmj.com/content/23/4/354.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -