Utility of TTR-INR guided warfarin adjustment protocol to improve time in therapeutic range in patients with atrial fibrillation receiving warfarin oleh Paisit Kosum, Noppachai Siranart, Kunathip Nissaipan, Wattakorn Laohapiboolrattana, Walit Sowalertrat, Kanittha Triamamornwooth, Rawiwan Arunphan, Apiradee Sriyom, Voravut Rungpradubvong