Characteristic | Number of studies (n = 87) | Percentage (%) |
---|---|---|
Publication year | ||
 2000–2002 | 2 | 2 |
 2003–2005 | 4 | 5 |
 2006–2008 | 12 | 14 |
 2009–2011 | 25 | 29 |
 2012–2014 | 31 | 36 |
 2015–2016 | 13 | 15 |
Study location | ||
 Africa | 57 | 66 |
 Asia | 16 | 18 |
 Europe | 2 | 2 |
 North America | 10 | 11 |
 South America | 2 | 2 |
Disease area | ||
 HIV | 44 | 51 |
 TB | 23 | 26 |
 Malaria | 28 | 32 |