[1] Charite Univ Med Berlin, Allergie Ctr Charite, Dept Dermatol & Allergy, Berlin, Germany
[2] Hosp La Paz, Inst Hlth Res IdiPAZ, Dept Allergy, Madrid, Spain
[3] Med Univ Graz, Dept Dermatol & Venereol, Graz, Austria
[4] Univ Milan, Osped Luigi Sacco, Dipartimento Sci Biomed & Clin Luigi Sacco, Milan, Italy
[5] Grenoble Univ Hosp, Natl Reference Ctr Angioedema, Dept Internal Med, Grenoble, France
[6] Shire, Zug, Switzerland
[7] Barts Hlth NHS Trust, Dept Immunol, London, England