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Reproducibility of range of motion and muscle strength measurements in patients with hip osteoarthritis – an inter-rater study

Erik Poulsen*, Henrik Wulff Christensen, Jeannette Østergaard Penny, Søren Overgaard, Werner Vach and Jan Hartvigsen

BMC Musculoskeletal Disorders 2012, 13:242  doi:10.1186/1471-2474-13-242

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