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Umans VA, Strauss BH, Rensing BJ, de Jaegere P, de Feyter PJ, Serruys PW.Umans VA, et al. Among authors: rensing bj.Am Heart J. 1991 Sep;122(3 Pt 1):836-43. doi: 10.1016/0002-8703(91)90533-n.Am Heart J. 1991.PMID: 1877459