Chairat , C. “Factors Associated With Delay First Medical Contact to Device Time in Patient With Acute ST-Segment Elevation Myocardial Infarction at Emergency Department, Nopparat Rajathanee Hospital”. Journal of The Department of Medical Services, vol. 45, no. 4, Mar. 2021, pp. 122-8, https://he02.tci-thaijo.org/index.php/JDMS/article/view/249789.