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58495 Studies found for: Placebo
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Map Legend
Region Name Number of Studies
World 58,495  
Africa   [map]   2,206  
Central America   [map]   1,039  
East Asia   [map]   6,773  
Japan 1,755   [studies]
Europe   [map]   17,387  
Middle East   [map]   2,986  
North America 28,517  
Canada   [map]   5,628   [studies]
Mexico 1,523   [studies]
United States   [map]   25,844   [studies]
North Asia   [map]   2,426  
Pacifica   [map]   2,653  
South America   [map]   3,047  
South Asia   [map]   1,325  
Southeast Asia   [map]   1,665  

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

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.