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Table 4 Levels of Evidence for Key Questions

From: WAO Guideline for the Management of Hereditary Angioedema

Grade of Evidence Number of Trials Authors
A 6 Craig et al, [26] Cicardi et al, [30] Cicardi et al, [31] Levy et al, [33] Zuraw et al, [34] Zuraw et al [35]
B 1 Kunschak et al [10]
C 7 Waytes et al, [7] Cicardi et al, [8] Farkas et al, [11] Szeplaki et al, [15] Ott et al, [19] Birjmohun et al, [23] Szegedi et al [25]
D 4 Bowen et al, [39, 43, 46] Longhurst et al [47]