Veloro, Lyra V., Michael Alexius A. Sarte, and Samantha S. Castañeda. “Collar Size As Predictor of Obstructive Sleep Apnea”. Philippine Journal of Otolaryngology Head and Neck Surgery 23, no. 2 (December 27, 2008): 14–16. Accessed May 3, 2024. https://pjohns.pso-hns.org/index.php/pjohns/article/view/727.