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. 2022 Mar 8;9:817735. doi: 10.3389/fmolb.2022.817735

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Copyright © 2022 Agwa, Elghazaly, El Meteini, Yahia, Khaled, Abd Elsamee, Darwish, Elsayed, Hafez, Mahmoud, EM and Matboli.

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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The histogram represents severity; the y-axis represents the frequency percentage in each group; the x-axis represents severity as numbers: 1, 2, and 3 for mild, moderate, and severe, respectively.