1. Department of Clinical and Experimental Medicine, Division of Obstetrics and Gynecology Oncology, University of Pisa, Via Savi 10, 56126 Pisa, Italy
2. Department of Life, Health and Environmental Sciences, University of L’Aquila, Piazzale Salvatore Tommasi 1, 67100 L’Aquila, Italy
3. Functional Genetics Unit, Center of Excellence on Aging (Ce.S.I.-Met), Via Dei Vestini 31, 66100 Chieti, Italy
4. Department of Psychological, Health and Territorial Sciences, School of Medicine and Health Sciences, ‘G.d’Annunzio’ University, Via Dei Vestini 31, 66100 Chieti, Italy
5. AMBRA-Associazione Medici e Biologi per la Riproduzione Assistita, Palermo, Italy
6. IVF Unit, Cannizzaro Hospital, Catania, Italy
7. Department of Biomedical Sciences and Biotechnolgy, Section of Biology and Genetics G. Sichel, University of Catania, Via S.Sofia, 87, 95123 Catania, Italy