1. Obstetrics and Gynaecology Department, Puerta de Hierro University Hospital, Madrid, Spain
2. Department Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland
3. Obstetrics and Gynaecology Department, 12 Octubre University Hospital, Madrid, Spain
4. Service of Pharmacy, Lausanne University Hospital, Lausanne, Switzerland
5. Obstetrics and Gynaecology Department, Gregorio Marañon University Hospital, Madrid, Spain