Shih-Hsin Liang1, Su-Peng Yeh2. 1. Division of Hematology and Oncology, Department of Internal Medicine, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 2, Minsheng Rd., Dalin Township, Chiayi County, 62247, Taiwan. 2. Division of Hematology and Oncology, Department of Internal Medicine, China Medical University Hospital, No. 2, Yu Der Road, Taichung, 40447, Taiwan. supengyeh@gmail.com.