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Elbarbary M, Oganesyan A, Honda T, et al. Ambient air pollution, lung function and COPD: cross-sectional analysis from the WHO Study of AGEing and adult health wave 1. BMJ Open Resp Res 2020;7:e000684.
The authors want to alert readers to the following correction made to the published version. The typos in the abstract section has been corrected as follows:
1. The participents in the method section has been corrected to 11, 693.
2. In results ‘ml’ has been removed from FEV1 /FVC (−2.81, 95%CI −3.37 to –2.25) and FEV1 /FVC (−1.85, 95%CI −2.24 to –1.46).