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BMC Health Services Research > 2018 > 18 > 1 > 1-10
European Journal of Applied Physiology > 2008 > 102 > 2 > 173-180
BMC Health Services Research > 2018 > 18 > 1 > 1-10
European Journal of Applied Physiology > 2008 > 102 > 2 > 173-180