1. Department of Respiratory Medicine, Shanghai Jiaotong University Affiliated Sixth People’s Hospital South Campus, Shanghai Fengxian District Central Hospital, Shanghai, China (mainland)
2. Department of Respiratory Medicine, First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
3. Department of Emergency, Medical Ward, First Clinical Medical College, Harbin, Heilongjiang, China (mainland)
4. Department of Respiratory Medicine, First Clinical Medical College, Harbin, Heilongjiang, China (mainland)
5. The Medical College of Jiamusi University, Jiamusi, Heilongjiang, China (mainland)