1. Department of Respiratory Medicine, The Eastern Hospital of The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
2. Department of Radiation Oncology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
3. Department of Medical Record and Statistics, The Eastern Hospital of The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
4. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China