1. Department of Oral and Maxillofacial Surgery, The Affiliated Stomatology Hospital of Southwest Medical University, Luzhou, Sichuan 646000, 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