| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| serum theophylline level normal | 2 | 0.6 | 4987 | 29 | 31 |
| serum | 1.15 | 0.6 | 2996 | 77 | 5 |
| theophylline | 1.99 | 0.2 | 8764 | 61 | 12 |
| level | 1.68 | 0.4 | 1615 | 2 | 5 |
| normal | 1.67 | 0.7 | 8655 | 69 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| serum theophylline level normal | 1.25 | 0.5 | 5178 | 35 |
