Khunsathian, Suchayada, Siriorn Sindhu, Orapan Thosingha, and Worawong Slisatkorn. “Factors Associated With Pre-Cardiopulmonary Arrest Signs Within the First 24 Hours Post Open Heart Surgery”. Siriraj Medical Journal 64, no. 5 (July 31, 2020): 153–156. Accessed September 29, 2022. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/244187.