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41638 Studies found for: during AND before

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Map Legend
Region Name Number of Studies
World 41,638
Africa [map] 1,527
Central America [map] 497
East Asia [map] 4,240
Japan 852 [studies]
Europe [map] 14,467
Middle East [map] 2,336
North America 17,654
Canada [map] 3,408 [studies]
Mexico 704 [studies]
United States [map] 15,516 [studies]
North Asia [map] 1,205
Pacifica [map] 1,219
South America [map] 1,799
South Asia [map] 684
Southeast Asia [map] 1,023

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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.