[1] ASL 1 Imperiese, Dept Allergy, Bordighera, Italy
[2] ARPA Sicilia, IBM CNR, Environm & Hlth, Palermo, Italy
[3] Univ Dept Med & Surg Specialties & Hlth, Perugia, Italy
[4] Univ Hosp G Martino, Messina, Italy
[5] Natl Hlth Serv, Allergy Unit, Cuneo, Italy
[6] Ist Clin Perfezionamento, Dept Allergy, Milan, Italy
[7] Stallergenes, Dept Sci, Milan, Italy
[8] Stallergenes, Dept Med, Milan, Italy