1 Universita ' degli Studi di Milano, Department of Pathophysiology and Transplantation, Milan, Italy; Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Department of Transfusion Medicine and Hematology, Milan, Italy.
2 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Internal Medicine and Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy.
3 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Department of Transfusion Medicine and Hematology, Milan, Italy.
4 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Virology Unit, Milan, Italy.
5 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Scientific Direction, Milan, Italy.
6 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Infectious Disease Unit, Milan, Italy.
7 Universita ' degli Studi di Milano, Department of Pathophysiology and Transplantation, Milan, Italy; Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Internal Medicine and Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy.
8 Immunorheumatology Research Laboratory, IRCCS Istituto Auxologico Italiano, Milan, Italy.
9 Universita ' degli Studi di Milano, Department of Pathophysiology and Transplantation, Milan, Italy; Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Internal Medicine and Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy. Electronic address: massimo.cugno@unimi.it.