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34422 Studies found for: standard AND United States

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Map Legend
Region Name Number of Studies
World [map] 34,422
Europe 2,976
Austria 506 [studies]
Belgium 972 [studies]
Bosnia and Herzegovina 36 [studies]
Bulgaria 324 [studies]
Croatia 137 [studies]
Czech Republic 144 [studies]
Denmark 464 [studies]
Estonia 119 [studies]
Finland 232 [studies]
France 1,378 [studies]
Germany 1,574 [studies]
Greece 385 [studies]
Hungary 684 [studies]
Iceland 9 [studies]
Ireland 193 [studies]
Italy 1,309 [studies]
Latvia 127 [studies]
Lithuania 118 [studies]
Luxembourg 9 [studies]
Macedonia, The Former Yugoslav Republic of 7 [studies]
Montenegro 1 [studies]
Netherlands 823 [studies]
Norway 230 [studies]
Poland 1,019 [studies]
Portugal 310 [studies]
Romania 368 [studies]
Serbia 189 [studies]
Slovakia 272 [studies]
Slovenia 55 [studies]
Spain 1,540 [studies]
Sweden 476 [studies]
Switzerland 434 [studies]
United Kingdom 1,456 [studies]

Click on a [map] link to show a map of that region.

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Studies with no locations are not included in the counts or on the map.

Studies with multiple locations are included in each region containing locations.