Affiliation: | aDepartment of Obstetrics and Gynecology, Hospital Universitario Virgen Macarena, E-41009 Sevilla, Spain;bDepartment of Obstetrics and Gynecology, Hospital Santiago Apóstol, E-01004 Vitoria-Gasteiz, Spain;cMedical Department, Bayer Schering Pharma, E-08037 Barcelona, Spain;dDepartment of Obstetrics and Gynecology, Hospital General de Requena, E-46340 Requena, Valencia, Spain;eDepartment of Obstetrics and Gynecology, Hospital Severo Ochoa, E-28911 Leganés, Madrid, Spain;fCentro Joven Madrid Salud y Programas de Planificación Familiar y Salud Materno-Infantil, Ayuntamiento de Madrid, E-28015 Madrid, Spain;gDepartment of Obstetrics and Gynecology, Hospital Cristal Piñor, E-32005 Ourense, Spain;hPASSIR (Programa d'Atenció a la Salut Sexual i Reproductiva), Barcelonès Nord i Maresme, Institut Català de la Salut, E-08913 Barcelona, Spain |