1. Department of Gynecology, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China;
2. Department of Pathology, Women’s Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China;
3. Department of Pathology, Zhejiang Provincial People’s Hospital, Hangzhou, People’s Republic of China;
4. School of Medicine, Zhejiang University City College, Hangzhou, People’s Republic of China