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Source: adapted from Bernstein JA, Cremonesi P, Hoffmann TK, Hollingsworth J. Angioedema in the emergency department: a practical guide to differential diagnosis and management. Int J Emerg Med. 2017;10(1):15. Review.(3)
IgE: immunoglobulin E; Factor XIIa: activated factor XII; B2 receptor B2: bradikinin receptor.
