1. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China
2. Department of Nuclear Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China
3. Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China
4. Yale Cancer Center, Yale School of Medicine, New Haven, CT
5. Departments of Thoracic Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China.