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Tracy CM, Winkler J, Brittain E, Leon MB, Epstein SE, Bonow RO.Tracy CM, et al. Among authors: bonow ro.J Am Coll Cardiol. 1987 Mar;9(3):483-8. doi: 10.1016/s0735-1097(87)80039-6.J Am Coll Cardiol. 1987.PMID: 3819195Free article.