1. Department of thoracic Surgery, Qinghai Provincial People’s Hospital, Xining, Qinghai Province, China
2. Department of Thoracic Surgery, Qinghai Red Cross Hospital, Xining, Qinghai Province, P. R. China
3. Wuhan Ruixing Biotechnology Co. Ltd., Wuhan, Hubei Province, China
4. Department of Respiratory Medicine, Qinghai Provincial People’s Hospital, Xining, Qinghai Province, China
5. Qinghai University School of Medicine, Qinghai University School of Medicine, Xining, Qinghai Province, China
6. Qinghai University, Xining, Qinghai Province, China