RT Journal Article SR Electronic T1 Forceful dilatation and oesophagomyotomy in patients with achalasia. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1298 OP 1299 DO 10.1136/gut.30.9.1298 VO 30 IS 9 A1 M Dakkak A1 J R Bennett YR 1989 UL http://gut.bmj.com/content/30/9/1298.1.abstract AB