1. Coagulation Laboratory; Department of Clinical Chemistry, Microbiology and Immunology; Ghent University Hospital; Ghent Belgium
2. University of Texas Medical Branch; APLS Laboratory; Galveston TX USA
3. Department of Biochemistry; Synapse BV; Maastricht University; Maastricht the Netherlands
4. Department of Clinical Sciences and Community Health; Angelo Bianchi Bonomi Hemophilia and Thrombosis Center; Università degli Studi di Milano and IRCCS Maggiore Hospital Foundation; Milan Italy
5. Department of Medicine II; Hokkaido University Graduate School of Medicine; Sapporo Japan
6. Departments of Medicine and Pathology; Duke University Medical Center; Durham NC USA