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Tjørhom A, Riiser A, Carlsen KH.Tjørhom A, et al. Among authors: riiser a.Scand J Med Sci Sports. 2007 Dec;17(6):628-35. doi: 10.1111/j.1600-0838.2006.00628.x. Epub 2007 Feb 19.Scand J Med Sci Sports. 2007.PMID: 17316372Clinical Trial.