1. Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu 610041, China
2. Intensive Care Unit, West China Hospital of Sichuan University, Chengdu 610041, China
3. Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University and Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Chengdu 610041, China