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Siegman IL, Maron BJ, Permut LC, McIntosh CL, Clark RE.Siegman IL, et al. Among authors: maron bj.J Am Coll Cardiol. 1989 Jun;13(7):1527-33. doi: 10.1016/0735-1097(89)90343-4.J Am Coll Cardiol. 1989.PMID: 2786016Free article.