Isao Yokota1, Kentaro Sakamaki2, Peter Y Shane3, Takanori Teshima3,4,5. 1. Department of Biostatistics, Hokkaido University Graduate School of Medicine, Sapporo, Japan. 2. Center for Data Science, Yokohama City University, Yokohama, Japan. 3. International Medical Department, Hokkaido University Hospital, Sapporo, Japan. 4. Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo, Japan. 5. Department of Hematology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.