1. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Zaragoza, Zaragoza, Spain
2. Obstetrics and Reproduction, Instituto Aragonés de Ciencias de la Salud, Zaragoza, Spain
3. Department of Obstetrics and Gynecology, Hospital Torrecárdenas, Almería, Spain
4. Centro de Estudios Económicos y Sociales en Salud, Universidad San Ignacio de Loyola, Lima, Perú
5. Department of Gynecology–Obstetrics and Pediatrics, Hospital Lusíadas Porto, Porto, Portugal
6. Lower Genital Tract Unit, Centro Hospitalar de São João, Porto, Portugal
7. Department of Gynecology–Obstetrics and Pediatrics, Faculdade de Medicina da Universidade do Porto, Porto, Portugal