Received: 8 February 2021
Accepted: 23 March 2021
First Online: 31 March 2021
: The study was approved by the Ethics Committees of Cancer Institution and Hospital, Chinese Academy of Medical Sciences, Hunan Cancer Hospital, Xi’an Tangdu Hospital, Harbin Medical University Cancer Hospital, the Affiliated Tumor Hospital of Xinjiang Medical University, Linyi Tumor Hospital, the Fourth Affiliated Hospital of Guangxi Medical University, Tianjin Medical University Cancer Institute and Hospital, Fudan University Shanghai Cancer Center, Sichuan Province Tumor Hospital, The Second Affiliated Hospital of Anhui Medical University, Central Hospital of Xuzhou, the Cancer Institute of Southeast University, The Fourth Hospital of Hebei Medical University, Nantong Tumor Hospital, Yunnan First People’s Hospital, Peking University People′s Hospital, Jining Medical College, Zhejiang Cancer Hospital, The Affiliated Hospital of Shantou University Medical College, Cangzhou Central Hospital, and patient consent was obtained from all the study participants. This study was conducted in consistence with protocol, good clinical practice, and the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.