1. Department of Pathology; Shandong University School of Basic Medical Sciences; 44#, Wenhua Xi Road Jinan Shandong 250012 PR China
2. Department of Pathology; The Affiliated Hospital of Qingdao University; 16#, Jiangsu Road Qingdao Shandong 266003 PR China
3. Institute of Occupational and Environmental Health; Shandong Center for Disease Control and Prevention; 16992#, Jingshi Road Jinan Shandong 250014 PR China
4. Department of pathogeny biology; Shandong University School of Basic Medical Sciences; 44#, Wenhua Xi Road Jinan Shandong 250012 PR China
5. Department of Pathology; Shandong University Qilu Hospital; 107#, Wenhua Xi Road Jinan Shandong 250012 PR China
6. Department of Pathology; The Affiliated Hospital of Jining Medical College; 89#, Guhuai Road Jining Shandong 272029 PR China
7. Department of Obstetrics and Gynecology; Renji Hospital, School of Medicine, Shanghai Jiao Tong University; Shanghai 200120 PR China