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Kostuj T, Rehart S, Matta-Hurtado R, Biehl C, Willburger RE, Schmidt K; study group “complication-register of the DGORh”.Kostuj T, et al. Among authors: schmidt k.BMJ Open. 2017 Oct 10;7(10):e015987. doi: 10.1136/bmjopen-2017-015987.BMJ Open. 2017.PMID: 29018066Free PMC article.