1. Escuela de Postgrado en Salud, Universidad Espíritu Santo, Samborondón, Ecuador
2. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
3. Research Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, Obstetrics and Gynecology Unit, IRCCS San Matteo Foundation, Pavia, Italy