RT Journal Article SR Electronic T1 An unexpected cause of iron deficiency JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1434 OP 1579 DO 10.1136/gutjnl-2020-321830 VO 70 IS 8 A1 Thomas Edward Conley A1 Timothy Andrews A1 Arvind Arumainathan A1 Paul O'Toole A1 Philip J Smith A1 Sreedhar Subramanian YR 2021 UL http://gut.bmj.com/content/70/8/1434.abstract AB