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Improvement in household stoves and risk of chronic obstructive pulmonary disease in Xuanwei, China: retrospective cohort study
BMJ 2005; doi: https://doi.org/10.1136/bmj.38628.676088.55 (Published 18 October 2005) Cite this as: BMJ 2005;:bmj;bmj.38628.676088.55v1
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