1. Departments of Medicine and Sciences of Aging Unit of Allergology, Irnrnunopathology and Occupational Medicine
2. Biomedical Sciences (Laboratorv of Clinical Microbiology)
3. ISPESL, Dipartimento Igiene del Lavoro, 00040 Monte Porzio Catone (Roma)
4. Centre of Occupational Medicine, University “G. D'Annunzio”, Chieti, (Italy).