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Salvesen KA, Mørkved S.Salvesen KA, et al. Among authors: morkved s.BMJ. 2004 Aug 14;329(7462):378-80. doi: 10.1136/bmj.38163.724306.3A. Epub 2004 Jul 14.BMJ. 2004.PMID: 15253920Free PMC article.Clinical Trial.