1. Institute of Clinical Physiology, National Research Council, 73100 Lecce, Italy
2. Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, 70121 Bari, Italy
3. Department of Biological and Environmental Science and Technology, University of Salento, 73100 Lecce, Italy
4. Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
5. Unit of Statistical and Methodological Support to Clinical Research, University Hospital of Modena, 41121 Modena, Italy
6. Infectious Diseases Unit, Vito Fazzi Hospital, 73100 Lecce, Italy