1. Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine
2. Department of Hematology, Sendai Medical Center
3. Department of Hematology, Japanese Red Cross First Hospital
4. Department of Molecular Hematology and Oncology, Tohoku University Graduate School of Medicine
5. Department of Hematology, Miyagi Cancer Center
6. Department of Gastroenterology, Tohoku University Graduate School of Medicine
7. Department of Pathology, Japanese Red Cross First Hospital