https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0193-y https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0192-z https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0203-0 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/1471-230X-14-180 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0196-8 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/1471-230X-14-186 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0191-0 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0197-7 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0202-1 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0194-x https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0198-6 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0200-3 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0189-7 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0199-5 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/1471-230X-14-188 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0201-2 https://bmcgastroenterol.biomedcentral.com/articles/10.1186/s12876-014-0195-9