1. Division of Hepatobiliary and Pancreatic Surgery, UC Irvine Medical Center, Orange, California
2. Division of Gastrointestinal Surgery, UC Irvine Medical Center, Orange, California
3. Department of Radiology, UC Irvine Medical Center, Orange, California
4. Division of Gastrointestinal Medicine, Chao Comprehensive Digestive Disease Center, UC Irvine Medical Center, Orange, California