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AJ Ali Jafar
AL Andrea Lasso
RS Risa Shorr
BH Brian Hutton
SK Shaun Kilty
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The primary outcome of interest was the extent of olfaction recovery following COVID-19 infection, using objective or subjective measures. Therefore, a baseline measurement of olfactory loss at time of infection or at study intake was compared to subsequent measurements at follow up intervals. Olfactory loss could be reported as a continuous or categorical measurement (anosmia, hyposmia, normosmia). Our secondary outcomes of interest included time to olfactory recovery, patient prognostic factors (for occurrence and resolution of olfactory dysfunction), and interventional therapies used for olfactory recovery.

Inclusion was limited to studies published in either the English, French, or Spanish languages.

Copyright and License information:  ©2021 Jafar et al ©2021 Eng OoiThis is an open access article distributed under the terms of the , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. ©2021 Eng OoiThis is an open access article distributed under the terms of the , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. ©2021 Eng OoiThis is an open access article distributed under the terms of the , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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