Table 9.
Top 10 countries with reference to number of papers
| United States | 6 |
|---|---|
| Australia | 3 |
| China | 3 |
| Finland | 3 |
| Sweden | 3 |
| United Kingdom | 3 |
| Netherlands | 2 |
| Singapore | 2 |
| Thailand | 2 |
| France | 1 |
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