Indication of the location of corresponding authors.
| Top Countries/ Regions | Authors | |
|---|---|---|
| 1 | China | 74 |
| 2 | United States | 67 |
| 3 | Japan | 39 |
| 4 | France | 30 |
| 5 | Iran | 30 |
| 6 | Algeria | 24 |
| 7 | Russia | 24 |
| 8 | Germany | 17 |
| 9 | India | 17 |
| 10 | Poland | 14 |
| 11 | United Kingdom | 11 |
| 12 | Spain | 10 |
| 13 | Estonia | 10 |
| 14 | Canada | 9 |
| 15 | Italy | 8 |
| 16 | South Korea | 8 |
| 17 | Slovakia | 6 |
| 18 | Malaysia | 5 |
| 19 | Netherlands | 4 |
| 20 | Brazil | 4 |
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.