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Table 1 Laboratory findings in hereditary angioedema [9,10,11]

From: The International/Canadian Hereditary Angioedema Guideline

Function C4 C1-INH antigen C1-INH
HAE-1
HAE-2 normal or ↑
HAE-nC1INH variants
 coagulation factor XII
 angiopoietin-1
 plasminogen
 unknown
normal normal normal