Roccaro Giorgio A, Goldberg David S
Division of Gastroenterology, University of Pennsylvania and Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
Gastroenterology. 2017 Jun;152(8):2072-2075. doi: 10.1053/j.gastro.2017.04.041. Epub 2017 May 3.