1. Department of Emergency Medicine, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
2. Department of Obstetrics and Gynecology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
3. Department of Obstetrics, Spital Emmental, 3400 Burgdorf, Switzerland
4. Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
5. Department of Angiology, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, Switzerland