1. Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei, China
2. Department of Infectious Disease, Hefei Second People’s Hospital, Hefei, China
3. Department of Pulmonary and Critical Care Medicine, Dushu Lake Hospital Affiliated to Soochow University, Medical Center of Soochow University, Suzhou, China
4. Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Soochow University, Suzhou, China