พุ่มไทรมูล ณ. “Risk Factors of Major Cardiovascular Complications during Surgery among Elderly Patients in Vachira Phuket Hospital”. Region 11 Medical Journal, vol. 31, no. 4, Dec. 2017, pp. 675-84, https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/172063.