1. Centre for Biostatistics University of Manchester Manchester UK
2. College of Biomedical and Life Sciences Cardiff University School of Medicine Cardiff UK
3. Primary Care Health Sciences University of Oxford Oxford UK
4. Balliol College University of Oxford Oxford UK
5. Reproductive Medicine Unit Christian Medical College Vellore India
6. Cochrane Gynecology and Fertility Group University of Auckland Auckland New Zealand
7. Centre for Reproductive Medicine Academic Medical Centre University of Amsterdam Amsterdam the Netherlands