1. Department of Radiation Oncology, the First Affiliated Hospital of Xiamen University, Xiamen 361003, People's Republic of China
2. Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Medical College of Xiamen University, Xiamen 361003, People's Republic of China
3. Department of Gastroenterology, Zhongshan Hospital of Xiamen University, Xiamen 361003, People's Republic of China
4. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Department of Radiation Oncology, Collaborative Innovation Center of Cancer Medicine, Guangzhou 510060, People's Republic of China
5. Department of Cardiovascular and Thoracic Surgery, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, People's Republic of China