Funding for this research was provided by:
Research and Development Project of Scientific Research Instruments and Equipment of Chinese Academy of Sciences-major instruments project (YJKYYQ20180039)
Digestive Medical Coordinated Development Center of Beijing Municipal Administration of Hospitals (XXZ0604)
Received: 3 August 2020
Accepted: 2 November 2020
First Online: 16 November 2020
Ethics approval and consent to participate
: The protocol for the research project has been approved by Bioethics Committee of Beijing Friendship Hospital, Capital Medical University, and that it conforms to the provisions of the Declaration of Helsinki. Written consent was obtained from every patient included in this study..
: Not applicable.
: The authors declare that they have no competing interests.