Ethics approval and consent to participate
Tumor, Cancer
TUMOR, CANCER
The present study protocols were approved by the ethics committees of each involved hospital (Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College; Beijing Cancer Hospital; Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College; The First Hospital of China Medical University; The Second Affiliated Hospital of Anhui Medical University; and Hebei Tumor Hospital) in accordance with the Declaration of Helsinki. Patients provided informed consent to participate in this study.