Exclusion criteria
| Number of cases | Reason for not being suitable for treatment with BTX-A |
| 3 | Previous injections |
| 4 | Weakness around joint |
| 7 | Biomechanical shortening of muscle |
| 3 | Not a focal problem |
| 3 | Problem identified was due to proximal difficulties not distal |
| 2 | Transient increases in tone only |
| 1 | Responding well to conventional treatment |