Neurocognitive phenotypes
| Phenotypea | No. |
|---|---|
| Developmental/intellectual delay | 16/19 (84%) |
| Speech delay | 17/19 (89%) |
| Autism spectrum disorder or features | 16/19 (84%) |
| Unusually strong long-term memory | 14/17 (82%) |
| Motor delay | 15/19 (79%) |
| Oromotor dysfunction | 16/19 (84%) |
| Hypotonia | 18/19 (95%) |
| Seizures, infantile spasms | 12/19 (63%) |
↵a Each row in column 1 has incomplete data.