Israsena Na Ayudhya, Woravipa, and Worawan Rojanawong. “Prevalence and Risk Factors of Positional Obstructive Sleep Apnea (POSA) among Children with Obstructive Sleep Apnea”. Vajira Medical Journal : Journal of Urban Medicine 66, no. 6 (December 23, 2022): 381–388. accessed September 18, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/256424.