1. Department of Obstetrics and Gynaecology, G. d’Annunzio University of Chieti-Pescara, Chieti, Italy;
2. School of Medicine and Health Science, G. d’Annunzio University of Chieti-Pescara, Chieti, Italy;
3. Laboratory of Biostatistics Department of Medical, Oral and Biotechnological Sciences G. d’Annunzio University, Chieti, Italy;
4. Department of Medicine and Ageing Sciences, G. d’Annunzio University of Chieti-Pescara, Chieti, Italy