Hansittiporn, K. “The Result of Setting up an Easy Asthma Clinic in Chiang Yuen Hospital Mahasarakham Province”. Srinagarind Medical Journal, vol. 27, no. 2, Aug. 2013, pp. 167-71, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/11115.