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Published online 2010 Mar 8. doi:  10.1186/1745-6215-11-24

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Participant Flow, Study Visits and Evaluations. Questionnaires: patient-rated outcomes, expectations, preferences, cost and utility measures. Objective Assessment includes blinded testing of motion and endurance. Phone Interviews include cost-measures. Qualitative Interviews include questions regarding perceptions of treatment, determinants of satisfaction.