1. Department of Assisted Reproduction, Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine Shanghai China
2. Department of Obstetrics and Gynaecology, The School of Clinical Sciences at Monash Health Monash University Clayton Victoria Australia
3. Aberdeen Centre for Women's Health Research, School of Medicine, Medical Sciences and Nutrition University of Aberdeen Aberdeen UK
4. Department of Obstetrics and Gynaecology, Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine Shanghai China
5. JC School of Public Health and Primary Care The Chinese University of Hong Kong Hong Kong Hong Kong SAR