1. Department of Obstetrics and Gynecology, Hospital Torrecárdenas, Almeria, Spain,
2. Institute of Biomedicine, Research Area for Women’s Health, Facultad de Ciencias Médicas, Universidad Católica de Santiago de Guayaquil, Guayaquil, Ecuador, and
3. Department of Obstetrics and Gynecology, Facultad de Medicina, Universidad de Zaragoza, Hospital Clínico Lozano Blesa, Zaragoza, Spain