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Nellessen U, Rafflenbeul W, Jost S, Daniel WG, Hecker H, Lichtlen PR.Nellessen U, et al. Among authors: lichtlen pr.Eur Heart J. 1988 Jan;9 Suppl A:83-8. doi: 10.1093/eurheartj/9.suppl_a.83.Eur Heart J. 1988.PMID: 3409918Clinical Trial.