1. Department of Respiratory Disease Thoracic Disease Center The First Affiliated Hospital College of Medicine Zhejiang University Hangzhou Zhejiang 310003 P. R. China
2. Lung Cancer and Gastroenterology Department Hunan Cancer Hospital Affiliated Tumor Hospital of Xiangya Medical School Central South University Changsha Hunan 410008 P. R. China
3. Thoracic Medicine Department 1 Hunan Cancer Hospital Affiliated Tumor Hospital of Xiangya Medical School Central South University Changsha Hunan 410008 P. R. China
4. State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious Diseases Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases The First Affiliated Hospital College of Medicine Zhejiang University Hangzhou Zhejiang 310003 P. R. China