1. Department of Therapeutic Research and Medicines Evaluation; Istituto Superiore di Sanità; Rome Italy
2. Department of Obstetrics and Neonatology; Città della Salute e della Scienza Hospital; University of Turin; Turin Italy
3. Division of Gynaecology and Obstetrics; S. Giovanni di Dio Hospital; University of Cagliari; Cagliari Italy
4. Department of Obstetrics and Gynaecology; Luigi Sacco Hospital; University of Milan; Milan Italy
5. Department of Infectious Diseases; Catholic University; Rome Italy
6. Department of Obstetrics & Gynaecology; Catholic University; Rome Italy
7. Department of Obstetrics and Gynaecology; DMSD San Paolo Hospital Medical School; University of Milan; Milan Italy
8. Department of Neurosciences, Reproductive and Dentistry Science; University Federico II, Naples; Naples Italy
9. Institute for Maternal and Child Health; IRCCS Burlo Garofolo; Trieste Italy
10. St. Orsola-Malpighi General Hospital; University of Bologna; Bologna Italy
11. Department of Obstetrics and Gynaecology; IRCCS Policlinico San Matteo; University of Pavia; Pavia Italy