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| Vertebral level | Number of patients |
|---|---|
| L4 to L5 | 31 |
| L5 to S1 | 25 |
| L4 to S1 | 14 |
| L3 to L5 | 9 |
| T10 to iliac | 4 |
| L3 to L4 | 5 |
| L3 to S1 | 3 |
| T2 to T6 | 2 |
| T11 to L3 | 2 |
| T11 to L1 | 1 |
| L2 to S1 | 2 |
| T4 to L1 | 1 |
| T9 to L5 | 1 |
| T10 to L2 | 1 |
| T12 to L4 | 1 |
| L1 to L4 | 1 |
| L1 to S1 | 1 |
| L2 to L4 | 1 |
| L2 to L5 | 1 |
| L3 to L5 | 1 |
| L2 to L3 | 1 |
| Total | 108 |
