Yuya Kimura1, Masami Takeuchi2, Kosei Matsue2. 1. Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-chou, Kamogawa, Chiba, 296-8602, Japan. yuk.close.to.wrd.34@gmail.com. 2. Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-chou, Kamogawa, Chiba, 296-8602, Japan.