RT Journal Article SR Electronic T1 GI symptoms and fever increase the risk of severe illness and death in patients with COVID-19 JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP gutjnl-2020-321751 DO 10.1136/gutjnl-2020-321751 A1 Jue Liu A1 Liyuan Tao A1 Xia Liu A1 Hongyan Yao A1 Shicheng Yu A1 Qiqi Wang A1 Jiaojiao Zhang A1 Zhancheng Gao A1 Rongmeng Jiang A1 Wenzhan Jing A1 Min Liu YR 2020 UL http://gut.bmj.com/content/early/2020/06/30/gutjnl-2020-321751.abstract AB