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BMC Public Health > 2016 > 16 > 1 > 1-14
Scandinavian Journal of Medicine & Science in Sports > 24 > 1 > e52 - e61
BMC Public Health > 2016 > 16 > 1 > 1-14
Scandinavian Journal of Medicine & Science in Sports > 24 > 1 > e52 - e61