1. West China Hospital, Sichuan University; National Key Laboratory of Biotherapy and Cancer Centre; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
2. West China Second University Hospital, West China Women's and Children's Hospital; Department of Obstetrics and Gynecology; No. 20, 3rd section, Renmin South Road Chengdu Sichuan China 610041
3. West China Hospital, Sichuan University; Chinese Clinical Trial Registry, Chinese Ethics Committee of Registering Clinical Trials; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
4. Royal United Hospital; Cochrane Gynaecological, Neuro-oncology and Orphan Cancer Group; Education Centre Bath UK BA1 3NG