[1] Allergy Clin, Genoa, Italy
[2] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Milan, Italy
[3] Univ Milan, Dept Clin Sci & Community Hlth, Milan, Italy
[4] Univ Pavia, Pediat Dept, Policlin San Matted, Pediat Clin, Pavia, Italy
[5] Univ Florence, Meyer Childrens Univ Hosp, Dept Hlth Sci, Florence, Italy
[6] Univ Pavia, Fdn IRCCS Policlin San Matteo, Dept Otorhinolaryngol, Pavia, Italy
[7] Ist Giannina Gaslini, Pediat Allergy Ctr, Genoa, Italy
[8] Univ Milan, Dept Pathophysiol & Transplantat, Milan, Italy