World Chinese Journal of Digestology, Volume 26, Issue 12,2018, Pages 707-715, doi:10.11569/wcjd.v26.i12.707
World Chinese Journal of Digestology, Volume 26, Issue 12,2018, Pages 748-754, doi:10.11569/wcjd.v26.i12.748
World Chinese Journal of Digestology, Volume 26, Issue 12,2018, Pages 735-741, doi:10.11569/wcjd.v26.i12.735