1. Department of Pathology, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541001, P.R. China
2. Department of Pathology and Physiopathology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
3. Department of Oral Molecular Pathology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770‑8504, Japan