1 Surgical Research Laboratory, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
2 Division of Internal Medicine, Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, Stockholm, Sweden.
3 Clinical Chemistry and Blood Coagulation Research, MMK, Dept of Pediatrics, CLINTEC, Karolinska Institutet, Department of Hematology, Karolinska University Hospital, Stockholm, Sweden.
4 UNC Blood Research Center, Division of Hematology, Department of Medicine, University of North Carolina at Chapel Hill, North Carolina, United States.