National Institute of Diabetes and Digestive and Kidney Diseases | Helicobacter pylori-negative gastritis: Prevalence and risk factors |
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American College of Gastroenterology guideline on the management of Helicobacter pylori infection | About GERD International Foundation for Gastrointestinal Disorders |
: American College of Gastroenterology | Last accessed 19 February, 2020 |
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Last accessed 19 February, 2020 | Last reviewed 11 January, 2016 |