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| Rank | Countries | Publications, n | Citations, n |
|---|---|---|---|
| 1 | USA | 1,017 | 31,301 |
| 2 | China | 867 | 14,134 |
| 3 | England | 326 | 9,753 |
| 4 | Germany | 318 | 9,376 |
| 5 | France | 215 | 7,559 |
| 6 | Japan | 188 | 2,844 |
| 7 | India | 179 | 2,543 |
| 8 | South Korea | 144 | 3,953 |
| 9 | Canada | 125 | 3,849 |
| 10 | Australia | 119 | 5,661 |
