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. 2020 Dec;12(12):7675–7682. doi: 10.21037/jtd-2020-abpd-001

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2020 Journal of Thoracic Disease. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Flexible bronchoscopes. (A) A 2.8-mm ultrathin bronchoscope with a 1.2-mm channel; (B) a 3.0-mm ultrathin bronchoscope with a 1.7-mm channel; (C) a 4.0-mm-diameter thin bronchoscope with a 2.0-mm-diameter channel; (D) a 4.8-mm standard bronchoscope with a 2.0-mm-diameter channel; and (E) a 5.9-mm therapeutic bronchoscope with a 3.0-mm-diameter channel.