Neurological signs | Number | Percentage (%) |
Convulsions | 19 | 65.5 |
Psychomotor retardation | 17 | 58.8 |
Spastic tetraparesis | 9 | 31.0 |
Axial hypotonia | 4 | 13.8 |
Peripheral hypotonia | 3 | 10.3 |
School delay | 3 | 10.3 |
Other* | 3 | 10.3 |