TY - JOUR AU - Becker, R C; Yang, H; Barrett, Y TI - Chromogenic laboratory assays to measure the factor Xa-inhibiting properties of apixaban--an oral, direct and selective factor Xa inhibitor JO - J Thromb Thrombolysis IS - 02 VL - 32 PY - 2011 DO - 10.1007/s11239-011-0591-8 L3 - PubMed-ID: 21516308 SP - 183 EP - 187 N1 - , et al. ER -