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APA Citation
Bennell, K., Khan, K. M., Matthews, B., De Gruyter, M., Cook, E., Holzer, K., & Wark, J. D. (1999). hip and ankle range of motion and hip muscle strength in young female ballet dancers and controls.. British journal of sports medicine, 33(5), 340–346. http://access.bl.uk/ark:/81055/vdc_100151274551.0x000051