1. Infectious Diseases Unit, Trieste University Hospital (ASUGI), 34125 Trieste, Italy
2. Operative Unit of Medicina Clinica, Trieste University Hospital (ASUGI), 34125 Trieste, Italy
3. Microbiology Unit, Trieste University Hospital (ASUGI), 34125 Trieste, Italy
4. Clinical Department of Medical, Surgical and Health Sciences, Trieste University, 34149 Trieste, Italy
5. Clinical Pathology and Microbiology Unit, “S. Giovanni di Dio” Hospital, 88900 Crotone, Italy