1. Department of Obstetrics and Perinatal Medicine, Alma Mater Studiorum-University of Bologna, Bologna, Italy
2. Department of Ophthalmology, University of Modena-Reggio-Emilia, Italy
3. Department of Gynecology and Pathophysiology of Human Reproduction, Alma Mater Studiorum-University of Bologna, Italy
4. Department of Obstetrics and Gynecology “P. Fioretti” University of Pisa, Italy