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Jakob Tarp, Knut Eirik Dalene, Jostein Steene-Johannessen and Ulf Ekelund declare that they have no conflicts of interest relevant to the content of this letter.
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Tarp, J., Dalene, K.E., Steene-Johannessen, J. et al. Comment on: “Cardiorespiratory Fitness in Childhood and Adolescence Affects Future Cardiovascular Risk Factors: A Systematic Review of Longitudinal Studies”. Sports Med 49, 159–161 (2019). https://doi.org/10.1007/s40279-018-01035-z
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DOI: https://doi.org/10.1007/s40279-018-01035-z