World
[]
|
628
|
North America
|
259
|
United States
|
236
|
[]
|
Alabama
|
12
|
[]
|
Arizona
|
18
|
[]
|
Arkansas
|
5
|
[]
|
California
|
50
|
[]
|
Colorado
|
16
|
[]
|
Connecticut
|
4
|
[]
|
Delaware
|
4
|
[]
|
District of Columbia
|
5
|
[]
|
Florida
|
31
|
[]
|
Georgia
|
16
|
[]
|
Hawaii
|
1
|
[]
|
Idaho
|
2
|
[]
|
Illinois
|
22
|
[]
|
Indiana
|
11
|
[]
|
Iowa
|
5
|
[]
|
Kansas
|
11
|
[]
|
Kentucky
|
12
|
[]
|
Louisiana
|
6
|
[]
|
Maine
|
4
|
[]
|
Maryland
|
25
|
[]
|
Massachusetts
|
20
|
[]
|
Michigan
|
18
|
[]
|
Minnesota
|
20
|
[]
|
Mississippi
|
3
|
[]
|
Missouri
|
19
|
[]
|
Montana
|
2
|
[]
|
Nebraska
|
10
|
[]
|
Nevada
|
4
|
[]
|
New Hampshire
|
1
|
[]
|
New Jersey
|
13
|
[]
|
New Mexico
|
6
|
[]
|
New York
|
34
|
[]
|
North Carolina
|
21
|
[]
|
North Dakota
|
2
|
[]
|
Ohio
|
27
|
[]
|
Oklahoma
|
6
|
[]
|
Oregon
|
13
|
[]
|
Pennsylvania
|
24
|
[]
|
Rhode Island
|
7
|
[]
|
South Carolina
|
11
|
[]
|
Tennessee
|
15
|
[]
|
Texas
|
54
|
[]
|
Utah
|
7
|
[]
|
Vermont
|
2
|
[]
|
Virginia
|
7
|
[]
|
Washington
|
10
|
[]
|
Wisconsin
|
12
|
[]
|
|
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Studies with multiple locations are included in each region containing locations.
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