Table 3.
Number of papers by countries as study settings.
| No. | Country Settings | Frequency | % | No. | Country | Frequency | % |
|---|---|---|---|---|---|---|---|
| 1 | United States | 108 | 44.1% | 19 | Czech | 2 | 0.8% |
| 2 | Ireland | 25 | 10.2% | 20 | France | 2 | 0.8% |
| 3 | Italy | 15 | 6.1% | 21 | Netherlands | 2 | 0.8% |
| 4 | India | 14 | 5.7% | 22 | Singapore | 2 | 0.8% |
| 5 | Australia | 9 | 3.7% | 23 | United Arab Emirates | 2 | 0.8% |
| 6 | Japan | 8 | 3.3% | 24 | Antarctica | 1 | 0.4% |
| 7 | Taiwan | 6 | 2.4% | 25 | Brazil | 1 | 0.4% |
| 8 | Spain | 5 | 2.0% | 26 | Bulgaria | 1 | 0.4% |
| 9 | United Kingdom | 5 | 2.0% | 27 | Egypt | 1 | 0.4% |
| 10 | Germany | 4 | 1.6% | 28 | Greece | 1 | 0.4% |
| 11 | Israel | 4 | 1.6% | 29 | Jordan | 1 | 0.4% |
| 12 | Switzerland | 4 | 1.6% | 30 | Malaysia | 1 | 0.4% |
| 13 | Iran | 3 | 1.2% | 31 | Mexico | 1 | 0.4% |
| 14 | Poland | 3 | 1.2% | 32 | New Zealand | 1 | 0.4% |
| 15 | Saudi Arabia | 3 | 1.2% | 33 | Pakistan | 1 | 0.4% |
| 16 | Austria | 2 | 0.8% | 34 | Sweden | 1 | 0.4% |
| 17 | Canada | 2 | 0.8% | 35 | Tunisia | 1 | 0.4% |
| 18 | China | 2 | 0.8% | 36 | Turkey | 1 | 0.4% |