1. Research Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, IRCCS S. Matteo Foundation, Pavia, Italy;
2. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy;
3. ULMUS private clinical center, Hlohovec, Slovakia;
4. Gynkomed private clinical center, Bratislava, Slovakia;
5. Clinical Research Department, Fidia Farmaceutici, SpA, Abano Terme, Italy