1. Department of Obstetrical-Gynaecological and Urological Science and Reproductive Medicine, Federico II University, Naples, Italy;
2. Dipartimento di Elettronica, Informazione e Bioingegneria (DEIB), Politecnico di Milano, Milano, Italy;
3. Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Pavia, Italy;
4. Department of Gynecology and Obstetrics, University of Salerno, Salerno, Italy