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Country or region of origin and various aspects of ASD addressed by the literatures included
| Country or Region of Origin | Number of Studies | Aspects of ASD | Number of Studies |
|---|---|---|---|
| Nigeria | 4 | Epidemiology | 2 |
| Egypt | 3 | Diagnosis | 3 |
| Sweden | 2 | Aetiology | 6 |
| Tunisia | 1 | Knowledge | 2 |
| Tanzania | 1 | ||
| Arabs (Tunisia & Egypt) | 1 | ||
