1. Division of Gastroenterology and Hepatology, Department of Medicine; Pancreaticobiliary Center, The University of Alabama at Birmingham; 1808 7th Ave S, BDB 380 Birmingham AL 35294 USA
2. Department of Radiology, Pancreaticobiliary Center; The University of Alabama at Birmingham; Birmingham AL USA
3. Department of Surgery, Pancreaticobiliary Center; The University of Alabama at Birmingham; Birmingham AL USA