1. Department of Hematology and Central Hematology Laboratory; Inselspital University Hospital; Bern Switzerland
2. Department for BioMedical Research; University of Bern; Bern Switzerland
3. Thrombosis Expertise Center and Laboratory of Clinical Thrombosis and Hemostasis, and Cardiovascular Research Institute; Maastricht University Medical Center; Maastricht The Netherlands
4. Department of Clinical Epidemiology and Medical Technology Assessment; Maastricht University Medical Centre; Maastricht The Netherlands