Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Richard C. Becker and Hongqiu Yang and Yuchen Barrett and Puneet Mohan and Jessie Wang and Lars Wallentin and John H. Alexander,"Chromogenic laboratory assays to measure the factor Xa-inhibiting properties of apixaban—an oral, direct and selective factor Xa inhibitor",Journal of Thrombosis and Thrombolysis,0929-5305,Springer Science and Business Media LLC,2011-04-23,32,2,183-187,https://cir.nii.ac.jp/crid/1363670321196317184,https://doi.org/10.1007/s11239-011-0591-8