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  1. Association of perceived physical health and physical fitness in two Swedish national samples from 1990 and 2015

    Article • Scandinavian Journal of Medicine and Science in Sports, September 2017, Wiley

    Dr Sven Johan Gustav Olsson

  2. Categorical answer modes provide superior validity to open answers when asking for level of physical activity: A cross-sectional study

    Article • Scandinavian Journal of Public Health, September 2015, SAGE Publications

    Dr Sven Johan Gustav Olsson