TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 1799 LP - 1800 DO - 10.1136/gut.30.12.1799 VL - 30 IS - 12 AU - Amnon Sonnenberg Y1 - 1989/12/01 UR - http://gut.bmj.com/content/30/12/1799.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -