1. Dental Clinic, Department of Health Sciences; University of Milan; Italy
2. Unit of Obstetrics and Gynecology; ‘L. Sacco’ Department of Biomedical and Clinical Sciences and Center for Fetal Research ‘Giorgio Pardi’; University of Milan; Italy
3. Gynecologic and Obstetric Clinic; Department of Surgical; Microsurgical and Medical Sciences; University of Sassari; Italy
4. Preventive and Community Dentistry; Department of Oral and Maxillofacial Sciences; ‘La Sapienza’ University of Rome; Italy