Beta-thromboglobulin (βTG), prothrombin fragments 1+2 (F1+2), were measured by commercial enzyme-linked immunosorbent assay (ELISA) in plasma samples collected in CTAD tubes as previously described (31 EDTA plasma was used to measure histamine (ELISA kit Starfish) and C3a levels (Microvue Complement C3a Plus, Quidel) (29 (link)). Blood, collected in EDTA tubes containing 100μl of meclofenamate (10μg/ml, Sigma-Aldrich), was used for thromboxane (Thromboxane B2 EIA Kit).