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Study protocol: a randomised controlled trial comparing the long term effects of isolated hip strengthening, quadriceps-based training and free physical activity for patellofemoral pain syndrome (anterior knee pain)

Crossref DOI link: https://doi.org/10.1186/s12891-015-0493-6

Published Online: 2015-02-25

Published Print: 2015-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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