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5975 Studies found for: zero
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Map Legend
Region Name Number of Studies
World 5,975  
Africa   [map]   194  
Central America   [map]   61  
East Asia   [map]   693  
Japan 238   [studies]
Europe   [map]   1,791  
Middle East   [map]   187  
North America 2,976  
Canada   [map]   513   [studies]
Mexico 96   [studies]
United States   [map]   2,714   [studies]
North Asia   [map]   173  
Pacifica   [map]   282  
South America   [map]   298  
South Asia   [map]   83  
Southeast Asia   [map]   174  

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