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. 2021 Dec 10;8:778283. doi: 10.3389/fmed.2021.778283

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Copyright © 2021 Qiu, Zhao, Zhang, Wang, Wang, Nie, Chen and Cheung.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparisons of relative mean thickness of RNFL, GCL, and GCC layers among the DM, NPDR, PDR, and normal control groups. The bar charts show the comparison results of the relative mean thickness of RNFL (A), GCL (B), GCC (C) in eyes with normal control (healthy subjects), DM (no DR), NPDR, and PDR. RNFL, retinal nerve fiber layer; GCL, ganglion cell layer; GCC, ganglion cell complex layer; DM, diabetes mellitus; DR, diabetic retinopathy; NPDR, non-proliferative diabetic retinopathy; PDR, proliferative diabetic retinopathy. * p < 0.05, ** p < 0.01, *** p < 0.001.