RT Journal Article SR Electronic T1 Advances in Parenteral Nutrition JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 546 OP 546 DO 10.1136/gut.20.6.546-a VO 20 IS 6 A1 Powell-Tuck, J. YR 1979 UL http://gut.bmj.com/content/20/6/546.2.abstract AB