Cognitive training and brain stimulation in patients with cognitive impairment: a randomized controlled trial.

"Declarations Ethics approval and consent to participateThe study protocol was approved by the ethics committee of the University Medicine Greifswald (Reference number BB 004/18). All participants provided informed consent. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Open Access funding enabled and organized by Projekt DEAL. The research reported in this publication was supported by the “Alzheimer Forschung Initiative e.V.” (#19009 to AF) and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project numbers INST 292/155–1 FUGG and 327654276 – SFB 1315. The funders had no role in the design and conduct of the study; collection, management, analyses, and interpretation of the data; preparation, review, or approval of the manuscript; or decision to submit the manuscript for publication."

"Trial registration The study is registered on ClinicalTrials.gov (NCT04265378). Registered on 7 February 2020. Retrospectively registered."