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Duodenal Ulcer
Helicobacter Infections
Crohn's Disease
Ulcerative Colitis
Peptic Esophagitis
Gastroesophageal Reflux
Stomach Ulcer
Double-Blind Method
Gastrointestinal Endoscopy
Helicobacter pylori
Anti-Ulcer Agents
Anti-Inflammatory Agents, Non-Steroidal
Omeprazole
Ranitidine
Histamine H2 Antagonists
Prospective Studies
Treatment Outcome
Time Factors
Recurrence
Gastric Mucosa
Co-Publications
70
63
58
35
31
23
19
17
16
15
14
13
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