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Juul L, Sandbaek A, Foldspang A, Frydenberg M, Borch-Johnsen K, Lauritzen T.Juul L, et al.Scand J Prim Health Care. 2009;27(4):223-31. doi: 10.3109/02813430903279117.Scand J Prim Health Care. 2009.PMID: 19929182Free PMC article.Clinical Trial.