1 Department of Clinical Chemistry, Microbiology and Immunology, Coagulation Laboratory, Ghent University Hospital, Ghent, Belgium.
2 Department of Neurosurgery, Ghent University Hospital, Ghent, Belgium.
3 Department of Hematology, Ghent University Hospital, Ghent, Belgium.
4 Department of Clinical Chemistry, Microbiology and Immunology, Coagulation Laboratory, Ghent University Hospital, Ghent, Belgium. katrien.devreese@uzgent.be.