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Subject (Region)
- European Union countries[remove]411
- Europe67
- United States23
- Italy12
- China10
- France10
- Spain10
- Germany8
- Greece7
- Europe, Eastern6
- Asia4
- Great Britain4
- Latin America4
- Poland4
- Russia (Federation)4
- Developing countries3
- Europe, Central3
- Portugal3
- Sweden3
- Austria2