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Pretreatment patient characteristics
| Characteristics | No. of patients (%) |
| No. of patients | 48 |
| Median | 66 |
| Range | 49 – 86 |
| Gender | |
| Male | 21 (42%) |
| Female | 27 (58%) |
| Side | |
| Right | 29 (60%) |
| Left | 19 (40%) |
| Involved Division (es) | |
| V1 | 16 (33%) |
| V2 | 39 (81%) |
| V3 | 27 (56%) |
| 1 division | 21 (44%) |
| 2 divisions | 20 (42%) |
| 3 divisions | 7 (14%) |
| Pain type | |
| Typical | 45 (94%) |
| Atypical | 3 (6%) |
| Previous invasive procedure | 4 (8%) |
| History of multiple sclerosis (MS) | 4 (8%) |
