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. 2020 Aug 3;99(11):1239–1244. doi: 10.1177/0022034520946251

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© International & American Associations for Dental Research 2020

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://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 page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 3. — Association between underlying diseases and duration of severe acute respiratory syndrome coronavirus-2 infection. (A) The duration of nasopharyngeal swab samples turning negative in patients with and without underlying diseases. (B) The delayed time required for samples to turn negative in the sputum samples in patients with and without underlying diseases. Values are presented as mean ± SD. **P < 0.005.