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Fig 4. Kaplan-Meier freedom from stenosis in group A (homograft gradient < 9 mm Hg at one year) and group B (homograft gradient 
9 mm Hg at one year). There were 19 patients who developed stenosis in group B, while only 4 of the homografts in group A became stenotic (p = 0.029, log-rank).
