Wongtiraporn W, Opartkiattikul N, Tientadakul P. The Value of Local ISI Calibration in Correcting the Variability in INR Determination. Siriraj Med J [Internet]. 2003 Jul. 1 [cited 2024 Apr. 26];55(7):381-4. Available from: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245416