20210207000900.0 2163-9469 Open journal of gastroenterology (Online) California 2163-9450 Open journal of gastroenterology (Online) http://www.scirp.org/journal/ojgas/ 2163-9469 2163-9469 2163-9469 Open journal of gastroenterology. portico Portico 2011/2023 2024-03-26 Preserved : 2011: 1, 2012: 2, 2013: 3, 2014: 4, 2015: 5, 2016: 6, 2017: 7, 2018: 8, 2019: 9, 2020: 10, 2021: 11, 2022: 12, 2023: 13 Preserved : 2011: 1(1-2), 2012: 2(1-4), 2013: 3(1-8), 2014: 4(1-12), 2015: 5(1-12), 2016: 6(1-12), 2017: 7(1-12), 2018: 8(1-12), 2019: 9(1-12), 2020: 10(1-12), 2021: 11(1-5, 9-12), 2022: 12(1-12), 2023: 13(1-10) Preserved Scientific Research Publishing Open Journal of Gastroenterology 2163-9469 2163-9450 Open journal of gastroenterology.