1. Department of Respiratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi’an, China
2. Department of Respiratory Medicine, PLA General Hospital, Beijing, China
3. Department of Geriatrics, Xianyang Central Hospital, Xianyang, China
4. Organ Transplant Institute, Fuzhou General Hospital (DongFang Hospital), Xiamen University, Fuzhou, China
5. State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi’an, China
6. State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi’an, China