1. Department of Medical and Surgical Sciences; Section of Infectious Diseases; “Alma Mater Studiorum” University of Bologna; S. Orsola-Malpighi Hospital; Bologna Italy
2. Department of Specialized, Diagnostic and Experimental Medicine; Section of Microbiology; “Alma Mater Studiorum” University of Bologna; S. Orsola-Malpighi Hospital; Bologna Italy