Healthcare utilization prior to a diagnosis of young-onset Alzheimer's disease: a nationwide nested case-control study.

"Declarations Conflicts of interestThe authors have no competing interests to declare that are relevant to the content of this article. Ethics approvalThis research project was approved by the Danish Data Protection Agency, Statistics Denmark and the Danish Health Data Authority. Danish law does not require ethics committee approval or informed patient consent. Conflicts of interest The authors have no competing interests to declare that are relevant to the content of this article."

"Funding Open access funding provided by National Hospital. The Danish Dementia Research Centre is supported by The Danish Ministry of Health which was not involved in any phase of this study (study design; the collection, analysis and interpretation of data; the writing of the report; and the decision to submit the article for publication). This research project did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors."