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.