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. 2020 May 5;2:e13. doi: 10.1017/ehs.2020.7

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© The Author(s) 2020

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 5. — Map of vowel centralization of /i/ and /u/ and merger of /i/ and /u/ after coronal consonants. Adapted by EdB from Kamei, Kōno, and Chino (1989), p. 1760.