Assessing the impact of different types of masks on COPD patients: a randomised controlled trial - Fan, Jingchun; Feng, Tiantian; Jiang, Xiaomei; Wei, Caihong; Zhang, Xuhui; Li, Caiyun; Yue, Feiyan; Yang, Hong; Bao, Shisan; Chen, Xuwen (ERJ open research, 2025)
Keywords: Original s