1. State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China;
2. Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; and
3. Division of Pulmonary and Critical Care Medicine, Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolia, China
4. Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona, Tucson, Arizona;
5. Division of Pulmonary Medicine, The People's Hospital of Inner Mongolia, Hohhot, Inner Mongolia, China;