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https://bjsm.bmj.com/content/57/12/749
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https://bjsm.bmj.com/content/57/12/789
British Journal of Sports Medicine
https://bjsm.bmj.com/content/57/12/780
British Journal of Sports Medicine
https://bjsm.bmj.com/content/57/12/771
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https://bjsm.bmj.com/content/57/12/762
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https://bjsm.bmj.com/content/57/11/737
British Journal of Sports Medicine
https://bjsm.bmj.com/content/57/11/722