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Ranking of the top 10 keywords for gut microbiota research in the heart failure field in terms of frequency.
| Ranking | Keyword | Frequency | Ranking | Keyword | Frequency |
| 1 | Gut microbiota | 173 | 6 | TMAO | 71 |
| 2 | Heart failure | 149 | 7 | Metabolism | 70 |
| 3 | Obesity | 122 | 8 | Antibiotic therapy | 69 |
| 4 | Risk factor | 93 | 9 | Management | 64 |
| 5 | Inflammation | 73 | 10 | Disease | 60 |
