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Shaddy RE, Boucek MM, Sturtevant JE, Ruttenberg HD, Jaffe RB, Tani LY, Judd VE, Veasy LG, McGough EC, Orsmond GS.Shaddy RE, et al.Circulation. 1993 Mar;87(3):793-9. doi: 10.1161/01.cir.87.3.793.Circulation. 1993.PMID: 8443900Clinical Trial.