Zhu, Z., Muhamad, A. S., Omar, N., Ooi, F. K., Pan, X., & Yin Ong, M. L. (2023). Prevalence and Risk Factors of COPD: A Scoping Review From 2011 to 2021. Malaysian Journal of Medicine and Health Sciences, 19(5), 345–358. https://doi.org/10.47836/mjmhs19.5.40