1. Department of Biochemistry, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China
2. Department of Mammary Gland and Gynecologic Oncology, Guizhou Cancer Hospital, Department of Oncology, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China