Table 2.
AO Classification n (%)
| 31.A1 | 9 (29.0%) | 31.B1 | 0 (0% ) |
| 31.A2 | 11 (35.5%) | 31.B2 | 7 (77.8% ) |
| 31.A3 | 11 (35.5%) | 31.B3 | 2 (22.2% ) |
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