SRICHAIPANHA, Somyong, Polpun BOONMAK, Suhattaya BOONMAK, Krisana SUMRET, and Sujettana POOMSAWAT. 2013. “Surveillance Of, and Risk Factors For, Difficult Intubation At Srinagarind Hospital”. Srinagarind Medical Journal 20 (1):24-30. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14571.