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Map of All Studies in
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Map Legend

Region Name   Number of Studies
World   [map]   179393  
North America 89822  
United States 81491   [studies]
Alabama 6327   [studies]
Alaska 396   [studies]
Arizona 7141   [studies]
Arkansas 3365   [studies]
California 21831   [studies]
Colorado 7250   [studies]
Connecticut 5376   [studies]
Delaware 1381   [studies]
District of Columbia 3747   [studies]
Florida 14443   [studies]
Georgia 8792   [studies]
Hawaii 1398   [studies]
Idaho 1739   [studies]
Illinois 11642   [studies]
Indiana 6649   [studies]
Iowa 3393   [studies]
Kansas 4422   [studies]
Kentucky 4745   [studies]
Louisiana 4828   [studies]
Maine 1327   [studies]
Maryland 12702   [studies]
Massachusetts 12131   [studies]
Michigan 9083   [studies]
Minnesota 7654   [studies]
Mississippi 2113   [studies]
Missouri 8719   [studies]
Montana 1597   [studies]
Nebraska 3865   [studies]
Nevada 2935   [studies]
New Hampshire 1640   [studies]
New Jersey 7293   [studies]
New Mexico 2332   [studies]
New York 17848   [studies]
North Carolina 11909   [studies]
North Dakota 1506   [studies]
Ohio 12900   [studies]
Oklahoma 4277   [studies]
Oregon 5624   [studies]
Pennsylvania 13980   [studies]
Rhode Island 2650   [studies]
South Carolina 6021   [studies]
South Dakota 1321   [studies]
Tennessee 8520   [studies]
Texas 17858   [studies]
Utah 4549   [studies]
Vermont 1437   [studies]
Virginia 7070   [studies]
Washington 8118   [studies]
West Virginia 1398   [studies]
Wisconsin 5220   [studies]
Wyoming 318   [studies]

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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.