1. Department Clinical Medicine, Chair of Clinical Immunology and Allergy, La Sapienza University
2. Chair of Internal Medicine, Catholic University
3. Centro Riferimento AIDS, Spallanzani Hospital, Rome
4. Department of Immunology, S. Martino Hospital, University of Genoa, Genoa, Italy
5. Department of Biomedical Sciences, University of Bari
6. Immunological Lab., University of Bologna
7. Department of Internal Medicine, University of Cagliari
8. Clinical Immunology, University of Florence
9. Department of Immunology, S. Martino Hospital, University of Genova
10. Infectious Disease, University of Milan
11. Infectious Disease, IRCCS H S. Raffaele, Milan
12. Department of Clinical and Experimental Medicine, University of Padoa
13. Clinical Immunology, La Sapienza University, Roma