Ungkanont, K. “The Outcome of Adenoidectomy and Tympa- nostomy Tube Insertion in Patients with Otitis Media with Effusion and Factor that Influences the Recurrence”. Siriraj Medical Journal, vol. 64, no. 5, July 2020, pp. 141-4, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/244183.