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Balloon Aortic Valvuloplasty in 170 Consecutive PatientsSafian, Robert D.; Berman, Aaron D.; Diver, Daniel J.; McKay, Linda L.; Come, Patricia C.; Riley, Marilyn F.; Warren, Sanford E.; Cunningham, Michael J.; Wyman, R. Michael; Weinstein, Joseph S.; Grossman, William; McKay, Raymond G. · New England Journal of Medicine · 1988