Allen John I, Kaushal Neal
Division of Gastroenerology and Hepatology, Department of Medicine, University of Michigan School of Medicine, Ann Arbor, Michigan.
Division of Gastroenterology, Adventist Health Systems, Sonora, California.
Clin Gastroenterol Hepatol. 2018 Jan;16(1):3-6. doi: 10.1016/j.cgh.2017.10.003.