1. Department of Hematology, The Affiliated Hospital of Qingdao University, Qingdao, People’s Republic of China
2. Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, People’s Republic of China
3. Department of Hematology, Yuhuangding Hospital of Yantai, Affiliated Hospital of Qingdao Medical University, Yantai, People’s Republic of China
4. Department of Hematology, Qingdao Central Hospital, Qingdao, People’s Republic of China
5. Department of Hematology, Linyi Central Hospital, Linyi, People’s Republic of China