Ethics approval and consent to participate
Cancer Center/Cancer
This study was first approved by the Ethics Committee of the National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, and the approval number was 17–056/1311. This study was carried out in accordance with the protocol and complied with ICH-GCP and GCP (the People’s Republic of China), the Declaration of Helsinki, and other relevant laws and regulations. Written informed consent signed and dated by the patients has been obtained.