Zhu Z, Muhamad AS, Omar N, Ooi FK, Pan X, Yin Ong ML. Prevalence and Risk Factors of COPD: A Scoping Review From 2011 to 2021. Malays J Med Health Sci [Internet]. 2023 Sep. 30 [cited 2025 Nov. 20];19(5):345-58. Available from: http://mjmhsojs.upm.edu.my/index.php/mjmhs/article/view/754