Locations
| Name | Sites | Samples |
|---|---|---|
| Georgia | 18 | 144 |
| Germany | 839 | 3997 |
| Ghana | 0 | 0 |
| Greece | 38 | 170 |
| Greenland | 18 | 274 |
| Hungary | 52 | 96 |
| Iran | 3 | 3 |
| Ireland | 454 | 1880 |
| Italy | 190 | 620 |
| Kazakhstan | 0 | 0 |
| Kenya | 22 | 335 |
| Kyrgyzstan | 0 | 0 |
| Latvia | 1 | 4 |
| Luxembourg | 26 | 57 |
| Malawi | 2 | 14 |
| Mauritius | 1 | 11 |
| Mexico | 66 | 212 |
| Moldova | 8 | 64 |
| Mongolia | 0 | 0 |
| Montenegro | 2 | 3 |
| Mozambique | 4 | 43 |
| Netherlands | 228 | 1428 |
| Nigeria | 1 | 1 |
| Norway | 19 | 35 |
| Panama | 11 | 51 |
| Paraguay | 2 | 2 |
| Peru | 108 | 290 |
| Poland | 363 | 2154 |
| Portugal | 105 | 250 |
| Romania | 104 | 293 |