1. Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
2. Infectious Diseases Division, Department of Medicine, University of Udine, Udine, Italy
3. Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
4. Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
5. Internal and Emergency Medicine Unit, Careggi University Hospital, Florence, Italy
6. Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
7. Department of Infectious Diseases, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
8. Department of Oncology Radiation, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
9. Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
10. Department of Cardiovascular, Respiratory, Nephrology, Anesthesiology, and Geriatric Sciences, Sapienza University of Rome, Rome, Italy
11. Center for Health Outcomes Research and Education, St. Louis College of Pharmacy, St. Louis, Missouri, USA