Towards objective measurements of habitual dietary intake patterns: comparing NMR metabolomics and food frequency questionnaire data in a population-based cohort.

"Declarations Ethical approval and consent to participateThe original study was approved by the Research Ethics Committee of Umeå University, Sweden, in 1984, and the current study was approved by the Regional Ethical Review Board, Gothenburg, Sweden, in 2017 (dnr 276 − 17). All procedures performed were in accordance with the ethical standards of the Research Ethics Committees in Sweden and with the 1964 Helsinki Declaration and its later amendments. All study participants provided a written 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 provided by University of Gothenburg. The Northern Sweden Diet Database was supported by the Swedish Research Council for Health, Working Life and Welfare and the Swedish Research Council. The current project was supported by grants from the Swedish Research Council (grants no. 2016 − 01216 and 2021 − 00954). The funders had no role in the design, analysis or writing of this article. Open access funding provided by University of Gothenburg."