Schulman Allison R, Thompson Christopher C
Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital, Boston, Massachusetts, USA.
Harvard Medical School, Boston, Massachusetts, USA.
Am J Gastroenterol. 2018 Feb;113(2):161-166. doi: 10.1038/ajg.2017.361. Epub 2017 Oct 10.