1. Department of Hematology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400042, P.R. China
2. Department of Hematology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
3. Department of Pathology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
4. Department of Pathology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuang 646000, P.R. China