Funding for this research was provided by:
National Natural Science Foundation of China (81373079, 81502873, 81673265, 81402147)
Peking Union Medical College Youth Fund (3332016131)
Natural Science Foundation of Jiangsu Province for Youth (BK20150997)
Natural Science Foundation of the Higher Education Institutions of Jiangsu Province (15KJB330001)
Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (PPZY2015A067)
Priority Academic Program for the Development of Jiangsu Higher Education Institutions (Public Health and Preventive Medicine)
Received: 20 October 2019
Accepted: 25 June 2020
First Online: 2 July 2020
Ethics approval and consent to participate
: The study was approved by the ethics committees of Nanjing Medical University and Cancer Institute and Hospital, Chinese Academy of Medical Sciences. The written informed consent was obtained from all participants after risk and benefit of participation were described.
: Not applicable.
: None declared.