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Region wise distribution of included studies from Asia
| Asian region (23) | Country of published study | No of studies |
|---|---|---|
| Eastern Asia n=6 | Korea | 3 |
| China | 3 | |
| Western Asia n=2 | Jordan | 1 |
| Iran | 1 | |
| Southern Asia n=8 | India | 6 |
| Bangladesh | 1 | |
| Sri Lanka | 1 | |
| South Eastern Asia n=2 | Indonesia | 2 |
| Central Asia n=0 | No study published | 0 |
| Total | 18 | |
