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Attack-free survival among patients with acquired angioedema with anti-C1INH antibodies and patients with acquired angioedema without anti-C1INH antibodies. Kaplan–Meier analysis of survival without attacks among 41 patients with acquired angioedema without anti-C1INH antibodies (white circle line) and 40 patients with acquired angioedema with anti-C1INH antibodies (black circle line), for whom data were available; log-rank test P = 0.045. C1INH = C1-inhibitor.
