1. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China (mainland)
2. Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China (mainland)
3. Department of Respiratory Medicine, The Eighth People’s Hospital of Nanning, Nanning, Guangxi, China (mainland)
4. Department of Respiratory Medicine, The Second Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China (mainland)