Departments of Medicine (D.L., W.C.) and Pathology (W.C.), Rhode Island Hospital and Warren Alpert Medical School of Brown University, Providence, Rhode Island; and Department of Gastroenterology, Shanghai Jiao-Tong University School of Medicine, Renji Hospital, Shanghai Institute of Digestive Disease, Shanghai, China (J.H.)

Departments of Medicine (D.L., W.C.) and Pathology (W.C.), Rhode Island Hospital and Warren Alpert Medical School of Brown University, Providence, Rhode Island; and Department of Gastroenterology, Shanghai Jiao-Tong University School of Medicine, Renji Hospital, Shanghai Institute of Digestive Disease, Shanghai, China (J.H.)

Departments of Medicine (D.L., W.C.) and Pathology (W.C.), Rhode Island Hospital and Warren Alpert Medical School of Brown University, Providence, Rhode Island; and Department of Gastroenterology, Shanghai Jiao-Tong University School of Medicine, Renji Hospital, Shanghai Institute of Digestive Disease, Shanghai, China (J.H.)