RT Journal Article SR Electronic T1 Biochemistry of Smooth Muscle JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 939 OP 939 DO 10.1136/gut.18.11.939 VO 18 IS 11 A1 Bennett, A. YR 1977 UL http://gut.bmj.com/content/18/11/939.1.abstract AB