1. Center for Reproductive Medicine, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
2. Department of Obstetrics, Rizhao Hospital of Traditional Chinese Medicine, Shandong, P.R. China
3. Department of Otorhinolaryngology, The First Affiliated Hospital of Hengyang Medical School, University of South China, Hunan, P.R. China
4. Department of Interventional Oncology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.