aAllergy and Respiratory Diseases, IRCCS Policlinico San Martino, Genoa, Italy

bDepartment of Internal Medicine (DIMI), University of Genoa, Geoa, Italy

cENT Department, IRCCS Policinico San Martino, University of Genoa, Genoa

dDepartment of Medicine, University of Verona, Verona, Italy

Correspondence to Diego Bagnasco, Assistant Professor, Allergy and Respiratory Clinic, Department of Internal Medicine, University of Genoa, IRCCS – Policlinic San Martino, Genoa, Italy. E-mail: [email protected]