Number of papers per country
| No. | Countries | No. of papers |
|---|---|---|
| 1 | The USA | 33 |
| 2 | Spain | 17 |
| 3 | The UK | 17 |
| 4 | South Korea | 15 |
| 5 | Taiwan | 15 |
| 6 | China | 11 |
| 7 | Greece | 10 |
| 8 | Hong Kong | 8 |
| 9 | Japan | 7 |
| 10 | Germany | 6 |
| 11 | Italy | 6 |
| 12 | Switzerland | 5 |
| 13 | Australia | 4 |
| 14 | Austria | 4 |
| 15 | Estonia | 4 |
| 16 | Malaysia | 4 |
| 17 | The Netherlands | 4 |
| 18 | Denmark | 3 |
| 19 | Portugal | 3 |
| 20 | Thailand | 3 |
| 21 | Belgium | 2 |
| 22 | Canada | 2 |
| 23 | Croatia | 2 |
| 24 | Finland | 2 |
| 25 | India | 2 |
| 26 | Indonesia | 2 |
| 27 | Ireland | 2 |
| 28 | Israel | 2 |
| 29 | Norway | 2 |
| 30 | Romania | 2 |
| 31 | Russia | 2 |
| 32 | Singapore | 2 |
| 33 | South Africa | 2 |
| 34 | Others (seven more countries) | 7 |
| No. | Countries | No. of papers |
|---|---|---|
| 1 | The USA | 33 |
| 2 | Spain | 17 |
| 3 | The UK | 17 |
| 4 | South Korea | 15 |
| 5 | Taiwan | 15 |
| 6 | China | 11 |
| 7 | Greece | 10 |
| 8 | Hong Kong | 8 |
| 9 | Japan | 7 |
| 10 | Germany | 6 |
| 11 | Italy | 6 |
| 12 | Switzerland | 5 |
| 13 | Australia | 4 |
| 14 | Austria | 4 |
| 15 | Estonia | 4 |
| 16 | Malaysia | 4 |
| 17 | The Netherlands | 4 |
| 18 | Denmark | 3 |
| 19 | Portugal | 3 |
| 20 | Thailand | 3 |
| 21 | Belgium | 2 |
| 22 | Canada | 2 |
| 23 | Croatia | 2 |
| 24 | Finland | 2 |
| 25 | India | 2 |
| 26 | Indonesia | 2 |
| 27 | Ireland | 2 |
| 28 | Israel | 2 |
| 29 | Norway | 2 |
| 30 | Romania | 2 |
| 31 | Russia | 2 |
| 32 | Singapore | 2 |
| 33 | South Africa | 2 |
| 34 | Others (seven more countries) | 7 |
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