1 Department of Medical and Surgical Sciences, University of Bologna, Bologna - Infectious Diseases Unit - Teaching Hospital S. Orsola-Malpighi - Bologna, Italy.
2 Institute of Clinical Pharmacology & Toxicology, Azienda Ospedaliero-Universitaria Santa Maria della Misericordia, Udine, Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy.