Respiratory Care · 2020 · 164 citations · 27 references
This study demonstrated that subjects with COPD who had modified Medical Research Council dyspnea scale scores ≥ 3 or FEV<sub>1</sub> < 30% predicted wear N95s only with care.
27
An Association between Air Pollution and Mortality in Six U.S. Cities
Douglas W. Dockery, C. Arden Pope, Xiping Xu et al. · New England Journal of Medicine · 1993 · 8.1K citations · Full text
Ole Raaschou‐Nielsen, Zorana Jovanovic Andersen, Rob Beelen et al. · The Lancet Oncology · 2013 · 1.6K citations · Full text