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Algorithm used to select a national prevalence
| Prevalences were selected using the following hierarchy: |
| (1) National studies. |
| (2) Studies with multiple sites across the country. |
| (3) Regional/city levels studies. |
| If more there was than one study (for example several multi-site studies) then the weight mean was used (or mean if this could not be calculated) to obtain the selected prevalence. |
