Classification, diagnosis, and approach to treatment for angioedema: consensus report from the <scp>H</scp>ereditary <scp>A</scp>ngioedema <scp>I</scp>nternational <scp>W</scp>orking <scp>G</scp>roup

University of Milan, Luigi Sacco Hospital, Medical University of Graz, Massachusetts General Hospital, Klinikum rechts der Isar, Technical University of Munich, University of Cincinnati Medical Center, Johannes Gutenberg University Mainz, Centre for Biomedical Network Research on Rare Diseases, Hospital La Paz Institute for Health Research, Semmelweis University, Faculdade de Medicina do ABC, Medical University of South Carolina, University of California, San Diego, University of Salerno