RT Journal Article SR Electronic T1 High prevalence of hyperplastic polyposis syndrome (serrated polyposis) in the NHS bowel cancer screening programme JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 475 OP 475 DO 10.1136/gutjnl-2012-303233 VO 62 IS 3 A1 Sujata Biswas A1 Antony J Ellis A1 Richard Guy A1 Helen Savage A1 Karen Madronal A1 James E East YR 2013 UL http://gut.bmj.com/content/62/3/475.1.abstract AB