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. 2023 Jul 4;18(3):160–167. doi: 10.1016/j.joto.2023.06.001

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© 2023 PLA General Hospital Department of Otolaryngology Head and Neck Surgery. Production and hosting by Elsevier (Singapore) Pte Ltd.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 2 — BMLD Vs Frequency.