Panprapakorn, Kornkla, Prakobkiat Hirunwiwatkul, Busarakum Chaitusaney, and Natamon Charakorn. “Nasal obstruction and positional obstructive sleep apnea”. Chulalongkorn Medical Journal 66, no. 2 (April 1, 2022). accessed April 8, 2025. https://he05.tci-thaijo.org/index.php/CMJ/article/view/78.