METHODS
major cancer, Cancer
ONCOLOGY, WEST, THORACIC, CANCER
This prospective, randomized, placebo‐controlled, multicenter clinical study was conducted at three major cancer centers in Sichuan province, China: Thoracic Oncology Ward, West China Hospital, Sichuan University; Cancer Center, No.7 People's Hospital of Chengdu; Cancer Center, People's Hospital of Sichuan Province. The study was approved by the Ethics Committee of the West China Hospital of Sichuan University and conformed to the Declaration of Helsinki. The study was registered in the Chinese Clinical Trial Registry (registration no.: ChiCTR1800019269). All eligible patients provided written informed consent.