1. Department of Respiratory Medicine, The First Affiliated Hospital, Nanjing Medical University, Nanjing, China.
2. The Department of Respiratory Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.
3. Department of Respiratory Medicine, Affiliated Hospital of Nantong University, Nantong, China.
4. Department of Respiratory Medicine, The Second Affiliated Hospital, Nanjing Medical University, Nanjing, China.