1. Obstetrics and Gynaecology; Alexandria University; Alexandria Egypt
2. Instituto Valenciano de Infertilidad Madrid; IVI Madrid; Madrid Spain
3. Centre for Reviews and Dissemination; University of York; York UK
4. Reproductive Endocrinology Section; Yale University; New Haven Connecticut USA
5. Knowledge Synthesis Platform, George & Fay Yee Centre for Healthcare Innovation; University of Manitoba; Winnipeg Canada
6. Department of Obstetrics and Gynaecology; Regency Specialist Hospital; Johor Bahru Malaysia