RT Journal Article SR Electronic T1 Membrane digestion JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 735 OP 747 DO 10.1136/gut.13.9.735 VO 13 IS 9 A1 Ugolev, A. M. YR 1972 UL http://gut.bmj.com/content/13/9/735.abstract AB