1 Hospital Universitario Doce de Octubre (Roig), Madrid, Spain; Hospital General Universitario Gregorio Marañón (Milán and Caballero), Madrid, Spain; Centro Gutemberg (Alonso), Málaga, Spain; IERA (Domínguez), Badajoz, Spain; Department of Obstetrics, Gynecology & Reproductive Sciences, University of Miami (Carugno), Florida; Hospital Universitario Ramón y Cajal (Moratalla), Madrid, Spain; Clínica Universidad Navarra (Alcázar), Pamplona, Spain. Electronic address: mcarreraroig@hotmail.com.
2 Hospital Universitario Doce de Octubre (Roig), Madrid, Spain; Hospital General Universitario Gregorio Marañón (Milán and Caballero), Madrid, Spain; Centro Gutemberg (Alonso), Málaga, Spain; IERA (Domínguez), Badajoz, Spain; Department of Obstetrics, Gynecology & Reproductive Sciences, University of Miami (Carugno), Florida; Hospital Universitario Ramón y Cajal (Moratalla), Madrid, Spain; Clínica Universidad Navarra (Alcázar), Pamplona, Spain.