The Spanish lower extremity functional scale: A reliable, valid and responsive questionnaire to assess musculoskeletal disorders in the lower extremity

1. Cruz-Díaz, D.
2. Lomas-Vega, R.
3. Osuna-Pérez, M.C.
4. Hita-Contreras, F.
5. Fernández, Á.D.
6. Martínez-Amat, A.