Funding for this research was provided by:
National Natural Science Foundation of China (81201902)
Shanghai Science and Technology Commission (19ZR1409600)
Shanghai Engineering and Research Center of Diagnostic and Therapeutic Endoscopy (16DZ228 0900)
Text and Data Mining valid from 2020-02-10
Received: 16 December 2019
Accepted: 4 February 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Fudan University. All procedures performed in studies involving human participants were in accordance with the ethics standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethics standards. Written informed consent was obtained from all individual participants included in this study.
: All data published here are under the consent for publication.
: The authors declare that they have no competing interests.