1. Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan, China (mainland)
2. Department of Oncology, The Peoples’ Hospital of Liaoning Province, Shenyang, Liaoning, China (mainland)
3. Department of Thoracic Surgery, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
4. Department of Oncology Medicine, Puyang Oilfield General Hospital, Puyang, Henan, China (mainland)
5. Department of Respiration Medicine, The People’s Hospital of Henan Province, Zhengzhou, Henan, China (mainland)