In US: For Research Use Only. Not for Use in Diagnostic Procedures. Lyophilized plasmas, at defined Apixaban concentrations (2 levels of about 150 and 300 ng/mL), as measured with BIOPHEN™ DiXal (Ref A221030-RUO) or BIOPHEN™ Heparin LRT (Ref A221011-RUO, A221013-RUO and A221015-RUO), for the quality control of Apixaban measurements using chromogenic assays.