Cardiopulmonary Physiology Effects of Wearing a Surgical Mask Versus an N95 Respirator in Patients with COPD during Walking: a Randomized Crossover Controlled Trial
LIU Jian, ZHANG Tianyi, AILIZHATI ·Aizezi, CHANG Ruijing, ZHANG Jianli, WANG Wan, JIANG Peng
Chinese General Practice . 2023, (24): 3028 -3032 .  DOI: 10.12114/j.issn.1007-9572.2022.0768

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