1. College of Respiratory and Critical Care Medicine, Chinese PLA General Hospital, Beijing, China
2. Beijing Tsinghua Changgung Hospital, Tsinghua University School of Medicine, Beijing, China
3. Institute for Precision Medicine, Tsinghua University, Beijing, China
4. Department of Infectious Diseases, Beijing Anzhen Hospital, Beijing, China
5. Section of Pulmonary and Critical Care and Sleep Medicine, Yale University School of Medicine, New Haven, Connecticut