Consensus Statement on the Diagnosis, Management, and Treatment of Angioedema Mediated by Bradykinin. Part I. Classifi cation, Epidemiology, Pathophysiology, Genetics, Clinical Symptoms, and Diagnosis Spanish Study Group on Bradykinin-Induced Angioedema (SGBA) (Grupo Español de Estudio del Angioedema mediado por Bradicinina: GEAB)