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57625 Studies found for: Placebo
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Map Legend
Region Name Number of Studies
World 57,625  
Africa   [map]   2,170  
Central America   [map]   1,031  
East Asia   [map]   6,624  
Japan 1,726   [studies]
Europe   [map]   17,135  
Middle East   [map]   2,934  
North America 28,152  
Canada   [map]   5,576   [studies]
Mexico 1,498   [studies]
United States   [map]   25,514   [studies]
North Asia   [map]   2,392  
Pacifica   [map]   2,609  
South America   [map]   2,996  
South Asia   [map]   1,310  
Southeast Asia   [map]   1,628  

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Click on a [studies] link to search within your current results for studies in that region. Use the back button to return to this list and try another region.

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.