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Swinkels BM, Vermeulen FE, Kelder JC, van Boven WJ, Plokker HW, Ten Berg JM.Swinkels BM, et al.Neth Heart J. 2011 Jun;19(6):273-8. doi: 10.1007/s12471-011-0103-7.Neth Heart J. 2011.PMID: 21494889Free PMC article.