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Duppen N, Etnel JR, Spaans L, Takken T, van den Berg-Emons RJ, Boersma E, Schokking M, Dulfer K, Utens EM, Helbing W, Hopman MT.Duppen N, et al. Among authors: schokking m.Am Heart J. 2015 Sep;170(3):606-14. doi: 10.1016/j.ahj.2015.06.018. Epub 2015 Jun 26.Am Heart J. 2015.PMID: 26385046Clinical Trial.