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Journal of Science and Medicine in Sport > 2015 > 18 > 5 > 518-522
The European Journal of Health Economics > 2013 > 14 > 3 > 383-390
Journal of Science and Medicine in Sport > 2015 > 18 > 5 > 518-522
The European Journal of Health Economics > 2013 > 14 > 3 > 383-390