Funding for this research was provided by:
National Natural Science Foundation of China (91742203, 81630071, 31530036, 81988101, 91942307)
Received: 3 February 2020
Accepted: 16 June 2020
First Online: 26 June 2020
Compliance with ethical standards
: The authors report no financial interests or potential conflicts of interests.
: This study was approved by the Research and Ethical Committee of Cancer Hospital, Chinese Academy of Medical Sciences, China and complied with relevant ethical regulations.
: Written informed consents were provided by all patients.