Table 6.
Top 20 world countries collaboration.
| world country collaboration | |||||
|---|---|---|---|---|---|
| Total articles |
H-cited articles |
||||
| From | To | Frequency | From | To | Frequency |
| China | USA | 152 | China | USA | 20 |
| China | Canada | 33 | USA | Germany | 5 |
| China | Australia | 17 | China | Canada | 3 |
| USA | Germany | 16 | Germany | Israel | 3 |
| China | Germany | 11 | China | Australia | 2 |
| China | United kingdom | 10 | China | Japan | 2 |
| USA | Denmark | 10 | Germany | Argentina | 2 |
| USA | Italy | 9 | Germany | Australia | 2 |
| Germany | United kingdom | 8 | Germany | Italy | 2 |
| China | Japan | 7 | Germany | Sweden | 2 |
| Germany | Australia | 7 | Germany | United kingdom | 2 |
| China | Pakistan | 6 | USA | Australia | 2 |
| Germany | Netherlands | 6 | USA | Italy | 2 |
| USA | India | 6 | USA | Japan | 2 |
| Canada | Pakistan | 5 | Argentina | Korea | 1 |
| Germany | France | 5 | Argentina | Sweden | 1 |
| Germany | Italy | 5 | Argentina | United kingdom | 1 |
| USA | Australia | 5 | Australia | Argentina | 1 |
| USA | Canada | 5 | Australia | Denmark | 1 |
| China | Denmark | 4 | Australia | France | 1 |