1. Nuffield Department of Obstetrics & Gynaecology and Oxford Maternal & Perinatal Health Institute; Green Templeton College; University of Oxford; Oxford; UK
2. Department of Obstetrics & Gynecology; University of Turin; Sant'Anna Hospital; Turin; Italy
3. Faculty of Health Sciences; Aga Khan University; Nairobi; Kenya
4. Department of Obstetrics & Gynecology; University of Bologna; Bologna; Italy
5. Université Paris V-René Descartes; Maternité Hôpital Necker-Enfants Malades; AP-HP; Paris; France