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Hauptman PJ, O'Connor KJ, Wolf RE, McNeil BJ.Hauptman PJ, et al.J Am Coll Cardiol. 2001 Apr;37(5):1252-8. doi: 10.1016/s0735-1097(01)01134-2.J Am Coll Cardiol. 2001.PMID: 11300431Free article.