Clinical Research Directory

Inclusion Criteria, known defects: * Known platelet function disorder under follow-up at Karolinska University Hospital (genetic or functional assay) * High likelihood of platelet function disorder (aberrant screening test with inheritance) * Family investigation for platelet disorder Exclusion Criteria, known defects:: * Antiplatelet or anticoagulant drugs * vWF:GPIb below 0.40 IU/mL * Hematocrit below 0.35 or above 0.50 * Other coagulation disorder Inclusion Criteria, suspected platelet function disorder: * Bleeding investigation at Karolinska University Hospital Exclusion Criteria, suspected platelet function disorder:: * Antiplatelet or anticoagulant drugs * vWF:GPIb below 0.40 IU/mL * Hematocrit below 0.35 or above 0.50 * Other coagulation disorder