1. Malmö Centre for Thrombosis and Haemostasis; Department of Clinical Chemistry; Malmö University Hospital; Malmö Sweden
2. Medical Sciences Institute; Blood Center of Wisconsin and Medical College of Wisconsin; Milwaukee WI USA
3. Colorado Coagulation; Laboratory Corporation of America Holdings; Englewood CO USA
4. Special Coagulation Laboratory; Mayo Clinic; Rochester MN USA
5. Octapharma OPG; Vienna Austria
6. Octapharma USA; Hoboken NJ USA