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References: 1. Longhurst HJ, Bork K. Hereditary angioedema: causes, manifestations and treatment. Br J Hosp Med (Lond). 2006;67(12):654-657. 2. Banerji A, Busse P, Christiansen SC, et al. Current state of hereditary angioedema management: a patient survey. Allergy Asthma Proc. 2015;36:213-217.