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10868 Studies found for: Placebo AND once
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Map Legend
Region Name Number of Studies
World [map] 10,868
Europe 3,768
Albania 1 [studies]
Austria 462 [studies]
Belgium 848 [studies]
Bosnia and Herzegovina 28 [studies]
Bulgaria 422 [studies]
Croatia 152 [studies]
Czech Republic 319 [studies]
Denmark 513 [studies]
Estonia 201 [studies]
Finland 338 [studies]
France 1,104 [studies]
Germany 1,622 [studies]
Greece 312 [studies]
Hungary 712 [studies]
Iceland 22 [studies]
Ireland 157 [studies]
Italy 957 [studies]
Latvia 192 [studies]
Lithuania 193 [studies]
Luxembourg 4 [studies]
Macedonia, The Former Yugoslav Republic of 19 [studies]
Montenegro 2 [studies]
Netherlands 760 [studies]
Norway 258 [studies]
Poland 1,019 [studies]
Portugal 266 [studies]
Romania 501 [studies]
Serbia 183 [studies]
Slovakia 376 [studies]
Slovenia 48 [studies]
Spain 1,089 [studies]
Sweden 582 [studies]
Switzerland 337 [studies]
United Kingdom 1,460 [studies]

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

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