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Salo P, Ylönen-Käyrä N, Häkkinen A, Kautiainen H, Mälkiä E, Ylinen J.Salo P, et al. Among authors: malkia e.Disabil Rehabil. 2012;34(23):1971-7. doi: 10.3109/09638288.2012.665128. Epub 2012 Mar 19.Disabil Rehabil. 2012.PMID: 22423628Clinical Trial.