1. Pediatric Highly Intensive Care Unit; Department of Pathophysiology and Transplantation; University of Milan, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico; Milan, Italy
2. University Hospital Hradec Kralove; Hradec Kralove, Czech Republic
3. Charles University; Faculty of Medicine in Hradec Kralove; Hradec Kralove, Czech Republic
4. Departments of Paediatrics and Clinical sciences; University of Milan; Milan, Italy
5. Novartis Vaccines and Diagnostics; Cambridge, MA USA