Countries contributing to the publications
| Country/Territory | Frequency | % |
|---|---|---|
| United States | 23 | 16.55 |
| India | 22 | 15.83 |
| United Kingdom | 18 | 12.95 |
| China | 15 | 10.79 |
| France | 15 | 10.79 |
| Italy | 14 | 10.07 |
| Russian Federation | 09 | 8.63 |
| Australia | 7 | 5.04 |
| Iran | 7 | 5.04 |
| Spain | 6 | 4.32 |
| Total | 135* | 100 |
| Country/Territory | Frequency | % |
|---|---|---|
| United States | 23 | 16.55 |
| India | 22 | 15.83 |
| United Kingdom | 18 | 12.95 |
| China | 15 | 10.79 |
| France | 15 | 10.79 |
| Italy | 14 | 10.07 |
| Russian Federation | 09 | 8.63 |
| Australia | 7 | 5.04 |
| Iran | 7 | 5.04 |
| Spain | 6 | 4.32 |
| Total | 135* | 100 |
Note(s): * This total number differs from the number of papers selected in the study as some authors have indicated dual countries as their affiliation
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