RT Journal Article SR Electronic T1 Disorders of gastrointestinal motility in childhood JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 283 OP 284 DO 10.1136/gut.30.2.283-b VO 30 IS 2 A1 David Wingate YR 1989 UL http://gut.bmj.com/content/30/2/283.3.abstract AB