|
World
|
677
|
|
Africa
[]
|
11
|
|
Central America
[]
|
3
|
|
East Asia
[]
|
34
|
|
Japan
|
5
|
[]
|
|
Europe
[]
|
165
|
|
Middle East
[]
|
24
|
|
North America
|
330
|
|
Canada
[]
|
44
|
[]
|
|
Mexico
|
2
|
[]
|
|
United States
[]
|
299
|
[]
|
|
North Asia
[]
|
9
|
|
Pacifica
[]
|
10
|
|
South America
[]
|
26
|
|
South Asia
[]
|
7
|
|
Southeast Asia
[]
|
15
|
|
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Studies with multiple locations are included in each region containing locations.
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