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Article History

Received: 7 March 2026

Revised: 12 May 2026

Accepted: 25 May 2026

First Online: 5 June 2026

Change Date: 26 June 2026

Change Type: Update

Change Details: The original online version of this article was revised because the author noted that the proof corrections weren't properly implemented in the final Version of Record. Specifically, the online figures look blurry, and the table column typesetting isn't consistent with their requested edits.

Declarations

Ethics approval: This registry-based study and both registries (MLC-R and MECFS-R) were approved by the Ethics Committee of the TUM School of Medicine and Health (2025–466, 2021–511, and 116–21, respectively) and adhere to the Declaration of Helsinki and its subsequent amendments.

Consent to participate: Written informed consent was obtained from patients and/or legal guardians for minors prior to inclusion in registries.

Competing interests: U.B. received funding for ME/CFS and PAIVS studies at the MCFC from the Bavarian Government, the German Government, foundations, and private donors. All other authors have no conflict of interest to declare.