Jovan P. Antovic, MD, PhD, Professor in coagulation and clinical chemistry and Senior Consultant, Department of Clinical Chemistry, Karolinska University Hospital and Department of Molecular Medicine and Surgery, Coagulation Research, Karolinska Institutet, Stockholm, Sweden. Maria Magnusson, MD, PhD, Head of the Department of Hematology and Senior Consultant in pediatric and adult coagulation, Karolinska University Hospital. Affiliated researcher, Department of Molecular Medicine & Surgery and Division of Pediatrics, Department of Clinical Science, Intervention & Technology, Karolinska Institutet.