World Chinese Journal of Digestology, Volume 29, Issue 12,2021, Pages 628-632, doi:10.11569/wcjd.v29.i12.628
World Chinese Journal of Digestology, Volume 29, Issue 12,2021, Pages 670-676, doi:10.11569/wcjd.v29.i12.670
World Chinese Journal of Digestology, Volume 29, Issue 12,2021, Pages 655-661, doi:10.11569/wcjd.v29.i12.655
World Chinese Journal of Digestology, Volume 29, Issue 12,2021, Pages 647-654, doi:10.11569/wcjd.v29.i12.647
World Chinese Journal of Digestology, Volume 29, Issue 12,2021, Pages 662-669, doi:10.11569/wcjd.v29.i12.662