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6391 Studies found for: value AND added

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Map Legend
Region Name Number of Studies
World 6,391
Africa [map] 288
Central America [map] 205
East Asia [map] 741
Japan 254 [studies]
Europe [map] 2,566
Middle East [map] 455
North America 3,073
Canada [map] 751 [studies]
Mexico 272 [studies]
United States [map] 2,743 [studies]
North Asia [map] 395
Pacifica [map] 360
South America [map] 446
South Asia [map] 193
Southeast Asia [map] 213

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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.