1. Department of Hematology and Central Hematology Laboratory, University Hospital and University of Bern, Bern, Switzerland
2. Service of Hematology, Clinica Luganese Moncucco, Lugano, Switzerland
3. Department of Obstetrics and Gynecology, University Hospital and University of Bern, Bern, Switzerland
4. Department of Hematology, University Hospital Basel, Basel, Switzerland
5. Department of Anesthesiology and Pain Medicine, Inselspital, University Hospital and University of Bern, Bern, Switzerland
6. Center for Thrombosis and Hemostasis, University Medical Center, Mainz, Germany
7. Service et laboratoire central d’hématologie, CHUV, University Hospital of Lausanne, Lausanne, Switzerland