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. 2023 Aug 4;10:1220205. doi: 10.3389/fmed.2023.1220205

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Copyright © 2023 Bozza, Graziani, Borghi, Marini, Duranti and Camilloni.

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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Persistent high titers of phases I and II IgG in patient’s serum after 3-year follow-up. Phases I and II antibodies were determined by ImmunoFluorescence Assays (IFA) on the patient’s serum tested at different dilutions. Images were acquired using a fluorescence high-resolution Microscopy Olympus DP71 with a 40× objective and the analySIS image processing software.