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. 2017 Dec 12;15(4):329–338. doi: 10.1177/1479972317745735

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 6. — Frequency of COPD exacerbations within 2 years according to the presence or absence of cataract. COPD: chronic obstructive pulmonary disease.