World Chinese Journal of Digestology, Volume 28, Issue 1,2020, Pages 18-25, doi:10.11569/wcjd.v28.i1.18
World Chinese Journal of Digestology, Volume 28, Issue 1,2020, Pages 1-8, doi:10.11569/wcjd.v28.i1.1
World Chinese Journal of Digestology, Volume 28, Issue 1,2020, Pages 33-38, doi:10.11569/wcjd.v28.i1.33