Francesco Blasi MD PhDProfessor of Respiratory Medicine, Department of Pathophysiology and Transplantation, University of Milan, Fondazione IRCCS Cà Granda-Ospedale Maggiore Policlinico, Milan, ItalyGeorgios Dimopoulos MD PhD FCCPAssistant Professor, Department of Critical Care Medicine, University Hospital Attikon, Medical School University of Athens, Greece