Flamm Steven L, Yang Yu-Xiao, Singh Siddharth, Falck-Ytter Yngve T
Division of Gastroenterology and Hepatology, Department of Medicine, Northwestern Feinberg School of Medicine, Chicago, Illinois.
Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
Gastroenterology. 2017 Feb;152(3):644-647. doi: 10.1053/j.gastro.2016.12.026. Epub 2017 Jan 2.