The purpose of this study is to evaluate whether the effect of the two new anticoagulants, Dabigatran and Rivaroxaban, can be reversed by non-specific and specific inhibitors. For Dabigatran the investigators will test the non-specific inhibitors: prothrombin complex concentrate (PCC), recombinant activated coagulation factor VII, and activated prothrombin-complex (FEIBA). For Rivaroxaban the investigators will test a specific Rivaroxaban decoy (FXa-GLAless). This will be done in a laboratory using blood plasma from healthy male volunteers.