RT Journal Article SR Electronic T1 Hyperplastic polyposis: semantics, biology, and endoscopy JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1019 OP 1021 DO 10.1136/gut.2009.195032 VO 59 IS 8 A1 Patrick M Lynch YR 2010 UL http://gut.bmj.com/content/59/8/1019.abstract AB