Funding for this research was provided by:
National Natural Science Foundation of China (No. 81670605)
the National Science & Technology Pillar Program of the twelfth Five-Year Plan in China (2012BAI06B02)
the clinical key projects of Peking University Third Hospital (Y76493-03)
the key laboratory for Helicobacter pylori infection and upper gastrointestinal diseases in Beijing (No. BZ0371)
Text and Data Mining valid from 2019-07-25
Received: 14 December 2018
Accepted: 21 July 2019
First Online: 25 July 2019
Ethics approval and consent to participate
: Each patient provided signed informed consent. This trial had approval from the Ethics Committee of Peking University Third Hospital, Beijing, China, and conformed to the Declaration of Helsinki following Good Clinical Practice. All authors evaluated study results and approved the final manuscript.
: Not applicable.
: The authors declare that they have no competing interests.