Table A1. Distribution of study cohort by country of birth and country of residence.
| Country of residence | Country of birth | ||
|---|---|---|---|
| Afghanistan | Pakistan | Total | |
| Afghanistan | 2,713 | 337 | 3,050 |
| Pakistan | 439 | 0 | 439 |
| Total | 3,152 | 337 | 3,489 |
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