Affiliation: | (1) Department of Anesthesiology and Intensive Care Medicine, Helsinki University Central Hospital, PO Box 266, 00029 Helsinki, Finland;(2) Coagulation Disorders, Department of Medicine/Hematology, Helsinki University Central Hospital, PO Box 340, 00029 Helsinki, Finland;(3) Department of Neurosurgery, Helsinki University Central Hospital, PO Box 266, 00029 Helsinki, Finland |