1. Digestive Disease Section Internal Medicine Yale School of Medicine New Haven CT USA
2. VA‐Connecticut Healthcare System West Haven CT USA
3. Gastroenterology and Multivisceral Transplant Unit Department of Surgery, Oncology, and Gastroenterology Padova University Hospital Padova Italy
4. Laboratory Medicine Yale School of Medicine New Haven CT USA
5. Hematology Internal Medicine Yale School of Medicine New Haven CT USA
6. Thrombotic and Hemorrhagic Diseases Unit General Internal Medicine Padova University Hospital Padova Italy