Srithawong, A., Poncumhak, P., Kumfu, S., & Promsrisuk, T. (2019). Predictive Equations for Peak Cough Flow in Healthy Senior Persons. Srinagarind Medical Journal, 34(5), 503–508. Retrieved from https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/217552