| Country | Authors | Papers |
| Austria | 2 |
6 |
| Bulgaria |
1 |
2 |
| Belgium | 3 |
12 |
| Canada | 4 |
4 |
| Chile |
1 |
2 |
| China |
2 |
1 |
| Croatia | 2 |
4 |
| France |
6 |
21 |
| Germany |
2 |
5 |
| Greece | 4 |
15 |
| India | 2 |
7 |
| Israel | 2 |
4 |
| Italy | 1 |
1 |
| Japan
|
2 |
4 |
| Jordan |
2 |
4 |
| Korea | 1 |
1 |
| The Netherlands | 4 |
20 |
| Portugal |
3 |
1 |
| Romania |
3 |
3 |
| Russia | 3 |
11 |
| Serbia |
1 |
3 |
| Switzerland | 1 |
1 |
| UK | 6 |
7 |
| USA | 23 |
44 |
| Uruguay |
1 |
1 |
| Venezuela |
1 |
3 |
| Vietnam |
2 |
4 |