Unrit K, Phase P, Deeraksa S. Effect of Adding Long-acting β2-agoniststo Inhaled Corticosteroids in Uncontrolled Preschool Asthma: A Retrospective Observational Study at Mahasarakham Hospital. Pnu Sci J [internet]. 2026 Jan. 26 [cited 2026 Sep. 17];18(1):304-21. available from: https://li01.tci-thaijo.org/index.php/pnujr/article/view/269427