Taksinachanekij, S., J. Chaichun, W. Hinwiset, and A. Chaichun. “Optimal PT-INR After Prosthetic Valve Replacement: Queen Sirikit Heart Center’s Experience”. The Thai Journal of Surgery, vol. 31, no. 2, Apr. 2010, https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/225879.