1 Infectious Diseases Unit, Department of Internal Medicine, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.
2 Center for Experimental and Molecular Medicine, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Amsterdam, The Netherlands.
3 Infectious Diseases Unit, Department of Internal Medicine, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy. andrea.gori@unimi.it.
4 Department of Pathophysiology and Transplantation, School of Medicine and Surgery, University of Milan, Milan, Italy. andrea.gori@unimi.it.