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. 2020 Oct 20;11:569249. doi: 10.3389/fmicb.2020.569249

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Copyright © 2020 Sandri, Correa, Spiezio, Trevisi, Luise, Modesto, Remy, Muzungaile, Checcucci, Zaborra and Mattarelli.

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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Box plots of the alpha diversity indices (Chao1, Shannon, InvSimpson) estimated for the different groups: Location (A), Sex (B), and Age categories (“1” < 20 years, 20 < “2” < 70 years, “3” > 70 years) (C).