Wong Robert J, Singal Ashwani K
Division of Gastroenterology and Hepatology, Alameda Health System, Highland Hospital, Oakland, California.
Sanford School of Medicine, University of South Dakota, Sioux Falls.
JAMA Netw Open. 2020 Feb 5;3(2):e1920294. doi: 10.1001/jamanetworkopen.2019.20294.