Funding for this research was provided by:
the Kempe Foundations
the Swedish Dementia Association
the Swedish Medical Association
the Trolle-Wachtmeister Foundation
the Northland Dementia Fund
the Swedish Alzheimer Fund
the Stohne Foundation
Umeå University Foundation for Medical Research
Received: 28 July 2021
Accepted: 6 June 2022
First Online: 15 June 2022
: The study was approved by the Regional Ethical Review Board in Umeå, Sweden (2010-229-31 M). The participants previously gave their consent to publications and research of stored serum samples.
: Not applicable.
: The authors declare that they have no competing interests.