World Chinese Journal of Digestology, Volume 28, Issue 7,2020, Pages 270-274, doi:10.11569/wcjd.v28.i7.270
World Chinese Journal of Digestology, Volume 28, Issue 7,2020, Pages 241-246, doi:10.11569/wcjd.v28.i7.241
World Chinese Journal of Digestology, Volume 28, Issue 7,2020, Pages 247-253, doi:10.11569/wcjd.v28.i7.247
World Chinese Journal of Digestology, Volume 28, Issue 7,2020, Pages 254-259, doi:10.11569/wcjd.v28.i7.254