1. Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, Rome, Italy.
2. Department of Infectious Diseases and Hepatology, Azienda Ospedaliera di Parma, Parma, Italy.
3. Division of Infectious Disease University of Bari, Bari, Italy.
4. Division of Infectious Diseases, Department of Experimental Medicine, University of Perugia, Perugia, Italy.
5. Department of Public Health and Infectious Diseases, Sapienza University, Rome, Italy.
6. Infectious Diseases Unit, Arcispedale S. Anna, Ferrara, Italy.
7. Infectious Diseases Unit, Ospedale Civile, Pistoia, Italy.
8. Infectious Diseases Unit, Pescara General Hospital, Pescara, Italy.
9. Clinic of Infectious Diseases, Ospedali Riuniti, Marche Polytechnic University, Ancona, Italy.