Janpol K, Manmee C, Krairitthichai U. (2017). Epidemiology of Influenza A (H1N1) 2009: Rajavithi Hospital. Journal of The Department of Medical Services, 42(3), 96–105. Retrieved from https://he02.tci-thaijo.org/index.php/JDMS/article/view/248875