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259188 Studies found for: intervention
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Map Legend
Region Name Number of Studies
World 259,188  
Africa   [map]   7,476  
Central America   [map]   2,627  
East Asia   [map]   28,230  
Japan 4,932   [studies]
Europe   [map]   72,688  
Middle East   [map]   10,305  
North America 119,104  
Canada   [map]   18,307   [studies]
Greenland 1   [studies]
Mexico 3,115   [studies]
United States   [map]   107,295   [studies]
North Asia   [map]   5,005  
Pacifica   [map]   6,852  
South America   [map]   8,989  
South Asia   [map]   4,173  
Southeast Asia   [map]   5,360  

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