1. Department of Obstetrics and Gynecology, Moriggia Pelascini Hospital, Gravedona, Como, Italy.
2. Department of Obstetrics and Gynecology, Ciriè Hospital, Ciriè, Italy.
3. Multidisciplinary Day Surgery Unit, Palagi Hospital, Florence, Italy.
4. Section of Anaesthesiology and Intensive Care, Donatello Clinic, Florence, Italy.
5. University of Eastern Piedmont, and Department of Obstetrics and Gynecology, University Hospital Maggiore della Carità, Novara, Italy.