Poomlek, V., Chaitree, W., Thongcharoen, P., Panchavinnin, P., & Opartkiattikul, N. (2008). A Comparative Study of Portable Monitors (CoaguCheck®XS) for International Normalized Ratio (INR). Siriraj Medical Journal, 60(1), 10–13. retrieved from https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246293