ธนพัตสิริยกุล พัทธนันท์. “Comparison of symptoms of influenza type A strains H1 (2009) in the year 2557-2558 to the age group of patients”. Region 11 Medical Journal 31, no. 2 (April 3, 2017): 287–291. accessed September 19, 2026. https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/170137.