1. Department of Respiratory Medicine, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou, Henan, China
2. Department of Respiratory Medicine, People’s Hospital of Zhengzhou University, Zhengzhou, Henan, China
3. Academy of Medical Science, Zhengzhou University, Zhengzhou, Henan, China
4. Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA