1. Department of Health Sciences, Public University of Navarra, 31008 Pamplona, Spain
2. Healthcare Research Institute of Navarra (IdiSNA), 31008 Pamplona, Spain
3. Department of Preventive Medicine, Clinica Universidad de Navarra, 31008 Pamplona, Spain
4. CIBER in Epidemiology and Public Health (CIBERESP), Institute of Health Carlos III, 46980 Madrid, Spain
5. Department of Nursing, Kystad Helse-og Velferdssenter, 7026 Trondheim, Norway
6. School of Health Sciences, Catholic University of Central Africa, Yaoundé 1100, Cameroon
7. Department of Surgery, Medical and Social Sciences, University of Alcala de Henares, 28871 Alcalá de Henares, Spain
8. Department of Obstetrics and Gynecology, Institute of Clinical Sciences, University of Gothenburg, 413 46 Gothenburg, Sweden
9. Department of Obstetrics and Gynecology, Sahlgrenska University Hospital, 413 46 Gothenburg, Sweden
10. Department of Sociosanitary Sciences, University of Murcia, 30100 Murcia, Spain
11. Jefferson College of Population Health, Philadelphia, PA 19107, USA
12. School of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
13. Interdisciplinary Research Institute for Health Law and Science, Sigmund Freud University, 1020 Vienna, Austria
14. Department of Surgery, Imperial College, London SW7 2AZ, UK