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| Method | Number of patients with abnormalities |
| EEG | 20 of 47 (42.6%) |
| cMRI | 29 of 50 (58.0%) |
| Audiometry | 8 of 16 (50.0%) |
| Sight test | 23 of 37 (62.2%) |
cMRI, Cranial magnetic resonance imaging; EEG, electroencephalography
