Chantawong ส., Usupharach ว., Songsaengrit เ., and Kittipanya-ngam พ. “Validity of Pre-Operative and Post-Operative Cardiac Rehabilitation Questionnaires in Patients With Open Heart Surgery”. Srinagarind Medical Journal, vol. 36, no. 5, Oct. 2021, pp. 557-61, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/252556.