1. Laboratory of Molecular Microbiology and Biotechnology, Department of Medical Biotechnologies, University of Siena, Siena, Italy
2. Department of Medicine and Surgery, LUM University “Giuseppe Degennaro”; Casamassima, Bari, Italy
3. Department of Medical Biotechnologies, University of Siena, Siena, Italy
4. Department of Medical Sciences, Infectious and Tropical Diseases Unit, University Hospital of Siena, Siena, Italy