1. Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Lymphoma Diagnosis and Treatment Center of Henan Province, Zhengzhou, Henan, China
2. Department of Hematology, Shanxi Cancer Hospital, Taiyuan, Shanxi, China
3. Department of Oncology, Nanjing General Hospital of Nanjing Military Command, Nanjing, Jiangsu, China
4. Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China