International Normalized Ratio as a Screening Test for Assessment of Anticoagulant Activity for Patients Treated With Rivaroxaban or Apixaban: A Pilot Study. - Ofek F; Barchel D; Perets N; Ziv-Baran T; Mahajna A; Filipovich-Rimon T; Garach-Jehoshua O; Berlin M; Berkovitch M (Frontiers in pharmacology, 2019)