Funding table
| Included studies n=305 | |
| Income classification of funding country* | |
| High-income economies | 250 (82.0%) |
| Upper middle-income economies | 30 (9.8%) |
| Lower middle-income economies | 0 |
| Low-income economies | 0 |
| UNICEF/WHO | 4 (1.3%) |
| Multi-income classification funding† | 15 (4.9%) |
| None | 6 (2.0%) |
| Funding source type | 299 |
| Industry | 61 (20.4%) |
| Non-industry | 238 (79.6%) |
| Education or medical institution | 10 (3.3%) |
| Government | 117 (39.1%) |
| Philanthropy | 111 (37.1%) |
*Based on World Bank definitions.
†Combined low income and high income or upper middle income and high income.