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Contributors All authors contributed to the conceptualisation and writing of this article.
Funding This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 675111, along with the Swedish Research Council.
Competing interests JOL, NB and EW are co-inventors on patents related to performance enhancing effects of nitrate and nitrite and co-directors of Heartbeet Ltd.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.
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