RT Journal Article SR Electronic T1 Neurophysiological assessment of the pelvic floor. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1 OP 4 DO 10.1136/gut.29.1.1 VO 29 IS 1 A1 M M Henry YR 1988 UL http://gut.bmj.com/content/29/1/1.abstract AB