1. Centre for Reproductive Biology, University of Edinburgh, UK
2. INSERM, Paris, France
3. Department of Population Health, London School of Hygiene & Tropical Medicine, London, UK
4. Simpson Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
5. Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
6. Directeur de recherche émérite, INED, / French Institute for Demographic Studies, Paris cedex, France
7. Department of Obstetrics and Gynaecologist, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
8. London School of Hygiene & Tropical Medicine, London, UK
9. Gynaecology, Obstetrics and Urology, Sapienza University of Rome, Policlinico Umberto I, Roma, Italy
10. Professor of Reproductive Medicine, Head of Division of Applied Health Sciences and Director Institute of Applied Health Sciences, School of Medicine and Dentistry, University of Aberdeen, Aberdeen Maternity Hospital, Foresterhill, Aberdeen, UK
11. IRCCS Ca’ Granda Foundation, Maggiore Policlinico Hospital, Milano, Italy
12. Maastricht University and Academisch ziekenhuis Maastricht, Dept. Obstetrics & Gynaecology, Maastricht, The Netherlands
13. Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, Milano, Italy
14. Dipartimento Integrato Materno Infantile, Università di Modena, Modena, Italy