1 Infectious Diseases Unit, Departement of Internal Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. laura.alagna@policlinico.mi.it.
2 Infectious Diseases Unit, Departement of Internal Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
3 Department of Pathophysiology and Transplantation, School of Medicine and Surgery, University of Milan, Milan, Italy.
4 Neuro Intensive Care Unit, Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy.
5 School of Medicine and Surgery, University of University of Milan-Bicocca, Milan, Italy.