Retraction Note: The Antidiabetic Metformin as an Adjunct to Antidepressants in Patients with Major Depressive Disorder: A Proof-of-Concept, Randomized, Double-Blind, Placebo-Controlled Trial

Retraction Note to: Neurotherapeutics https://doi.org/10.1007/s13311-020-00878-7

The Editor-in-Chief has retracted this article. Concerns have been raised about the data presented. The response from the authors to these concerns has shown that there are serious issues with the ethical oversight, the reporting and the availability of audited data for this clinical trial. The Editor-in-Chief therefore no longer has confidence in the results and conclusions presented. All authors disagree with this retraction.