1. Department of Thoracic Oncology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, 310003, China
2. Department of Gastroenterology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, 310003, China
3. Department of Radiotherapy, The First Affiliated Hospital, College of Medicine, Zhejiang Traditional Chinese Medical University, Hangzhou, Zhejiang Province, 310006, China