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Leon AR, Eisner RL, Martin SE, Schmarkey LS, Aaron AM, Boyers AS, Burnham KM, Oh DJ, Patterson RE.Leon AR, et al. Among authors: eisner rl.J Am Coll Cardiol. 1992 Dec;20(7):1612-25. doi: 10.1016/0735-1097(92)90458-y.J Am Coll Cardiol. 1992.PMID: 1452936Free article.