Polish Cross-Cultural Adaptation of the Lower Limb Functional Index (LLFI) Demonstrates a Valid Outcome Measure for the Lower Limb Region and Joints von Bejer, Agnieszka, Bieś, Agnieszka, Kyc, Sylwia, Lorenc, Magdalena, Mataczyński, Piotr, Domka-Jopek, Elżbieta, Melloh, Markus, Gabel, Charles Philip

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