Tontisirin, Cherdchai, Chusak Kuptarnond, somphob Prathanee, Nopadol Tongsopit, and Amorn Suwannimit. 2013. “Closed Mitral Valvlotomy at Srinagarind Hospital”. Srinagarind Medical Journal 1 (2):125-32. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13265.