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| campylobacter-pyloridis (1) |
| duodenal-ulcer (1) |
| gastritis (1) |
| infection (1) |
| lipopolysaccharides (1) |
| liquid-media (1) |
| peptic-ulceration (1) |
| polyacrylamide gels (1) |
| unidentified curved bacilli (1) |
| vacuolating cytotoxin (1) |