1. Department of Respiratory and Critical Care Medicine, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, Guangdong, China
2. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
3. Department of Respiratory Medicine, Minzu Hospital of Guangxi Zhuang Autonomous Region, Guangxi Medical University, Nanning, China
4. Department of Respiratory and Critical Care Medicine, The First People’s Hospital of Huaihua City, Huaihua, Hunan, China
5. State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, National Center for Respiratory Medicine, Guangzhou, China