1. Department of Oncology, 88th Hospital of PLA, Tai’an, People’s Republic of China
2. Department of Internal Medicine, Suncun Hospital of Shandong Xinwen Mining Group, Xintai, People’s Republic of China
3. Department of Radiotherapy, Shandong University Affiliated Jinan Central Hospital, Ji’nan, People’s Republic of China
4. Department of General Surgery, Shanghai Chang Zheng Hospital, Second Military Medical University, People’s Republic of China