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Demer LL, Ariani M, Siegel RJ.Demer LL, et al. Among authors: siegel rj.J Am Coll Cardiol. 1991 Nov 1;18(5):1259-62. doi: 10.1016/0735-1097(91)90544-j.J Am Coll Cardiol. 1991.PMID: 1833429Free article.
Hong AS, Chae JS, Dubin SB, Lee S, Fishbein MC, Siegel RJ.Hong AS, et al. Among authors: siegel rj.Am Heart J. 1990 Aug;120(2):418-22. doi: 10.1016/0002-8703(90)90088-f.Am Heart J. 1990.PMID: 2382618