1. Department of Hematology, Clinical Immunology and Infectious Diseases, Ehime University Graduate School of Medicine, 454 Shitsukawa, Toon, Ehime, 791-0295, Japan 2. Division of Blood Transfusion and Cell Therapy, Ehime University Graduate School of Medicine, 454 Shitsukawa, Toon, Ehime, 791-0295, Japan 3. Division of Laboratory Medicine, Ehime University Graduate School of Medicine, 454 Shitsukawa, Toon, Ehime, 791-0295, Japan