1. Department of Physiology and Pathophysiology , School of Basic Medical Sciences , Peking University , Beijing , China
2. Department of Integration of Chinese and Western Medicine , School of Basic Medical Sciences , Peking University , Beijing , China
3. Department of Gynecology, the First Affiliated Hospital of China Medical University , Shenyang , Liaoning Province , China
4. Department of Pathology , Central Hospital of Zibo , Zibo , Shandong Province , China