TABLE 1.
Grading system
| GRADE | PERCENT CLEARANCE | NUMBER OF PATIENTS |
|---|---|---|
| 1 (poor) | 0–25 | 0 |
| 2 (fair) | 26–50 | 0 |
| 3 (good) | 51–75 | 0 |
| 4 (excellent) | 76–95 | 3 (all >90% clearance) |
| 5 (clear) | >95 | 2 |
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