1. Division of Gastroenterology; Department of Medicine; Massachusetts General Hospital; Boston MA USA
2. Harvard Medical School; Boston MA USA
3. Division of Gastroenterology; Department of Medicine; Boston Medical Center; Boston MA USA
4. Division of Gastroenterology; Department of Medicine; University of Pennsylvania Health System; Philadelphia PA USA
5. Division of Gastroenterology; Department of Medicine; Beth Israel Deaconness Medical Center; Boston MA USA
6. Division of Gastroenterology; Department of Medicine; Lahey Hospital & Medical Center; Burlington MA USA
7. Biostatistics Center; Massachusetts General Hospital; Boston MA USA
8. Division of Surgical Oncology; Department of Surgery; Massachusetts General Hospital; Boston MA USA
9. Department of Pathology; Massachusetts General Hospital; Boston MA USA
10. Department of Medicine; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul South Korea