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. 2020 Apr 16;10:6514. doi: 10.1038/s41598-020-63630-3

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Flow chart. Patients who showed vertical nystagmus in the BLT, along with their diagnosis. Analysis in this study was performed in 208 BPPV and 17 non-BPPV patients who exhibited vertical nystagmus in the BLT. BLT, Bow and Lean Test; BPPV, benign paroxysmal positional vertigo. PSC, posterior semicircular canal; HSC, horizontal semicircular canal; ASC, anterior semicircular canal.