1. Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, Shandong 266021, P.R. China
2. Department of Biotechnology, School of Basic Medicine, Qingdao University, Qingdao, Shandong 266021, P.R. China
3. Department of Pathology, Navy 971 Hospital of The People's Liberation Army, Qingdao, Shandong 266000, P.R. China
4. Laboratory of Human Microscopic Structure, School of Basic Medicine, Qingdao University, Qingdao, Shandong 266021, P.R. China