EXPRESSION OF CONCERN: Th17 and treg cells function in SARS‐CoV2 patients compared with healthy controls.

This document is an expression of concern regarding an article titled "Th17 and treg cells function in SARS-CoV2 patients compared with healthy controls." The concern arises from questions raised by third parties about the legitimacy of authorship positions in the article. Some authors were added at later stages of the revision process without prior collaboration history with the submitting author group, and the authors were unable to provide documentation of their contributions. The journal has decided to issue this expression of concern to inform readers and raise concerns about the integrity of the authorship and the work presented in the article. [Extracted from the article]