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Table 2.
The assessment criteria of BB disease severity
| Rank | Lesion proportion (%) |
|---|---|
| 0 | 0 |
| 1 | 0–10 |
| 2 | 10–20 |
| 3 | 20–50 |
| 4 | 50–75 |
| 5 | 75–100 |