TY - JOUR T1 - Gastroenterology JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 803 LP - 803 VL - 23 IS - 136 AU - H. W. K. Acheson Y1 - 1973/11/01 UR - http://bjgp.org/content/23/136/803.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -