1 Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, People's Republic of China.
2 Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei, Anhui Province, People's Republic of China.
3 Department of Integrated Traditional Chinese and Western Medicine, Anhui Medical University, Hefei, Anhui Province, People's Republic of China.