Indication of the location of corresponding authors.
| Top Countries/ Regions | Authors | |
|---|---|---|
| 1 | China | 913 |
| 2 | United States | 384 |
| 3 | Spain | 279 |
| 4 | Iran | 194 |
| 5 | India | 113 |
| 6 | Italy | 88 |
| 7 | Germany | 78 |
| 8 | United Kingdom | 68 |
| 9 | Turkey | 67 |
| 10 | France | 65 |
| 11 | Japan | 62 |
| 12 | Russia | 56 |
| 13 | Canada | 53 |
| 14 | South Korea | 52 |
| 15 | Australia | 40 |
| 16 | Belgium | 33 |
| 17 | Mexico | 32 |
| 18 | Austria | 31 |
| 19 | Brazil | 30 |
| 20 | Hong Kong | 29 |
Our authors submit research articles from all over the world. Authors collaborate frequently with peers at different institutions and in different countries/regions. This graph indicates the number of primary corresponding authors at the country/region level in the last five years.