Longdom Publishing SL https://www.longdom.org/ Longdom Publishing SL specializes in digital advertising to help clients inform and attract new customers quickly and efficiently. https://www.longdom.org/global-journal-interdisciplinary-social-sciences/current-issue.html Global Journal of Interdisciplinary Social Sciences Volume 9, Issue 1 https://www.longdom.org/articles/announcement-international-conference-on-digestive-and-gastroenterology-health-conditions-barcelona-spain-on-july-2021-2.pdf Announcement International Conference on Digestive and Gastroenterology Health Conditions Barcelona Spain on July 2021 2020 Abbasian Nima