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Map of All Studies in
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Map Legend

Region Name   Number of Studies
World   [map]   179158  
North America 89729  
United States 81410   [studies]
Alabama 6325   [studies]
Alaska 397   [studies]
Arizona 7141   [studies]
Arkansas 3364   [studies]
California 21814   [studies]
Colorado 7241   [studies]
Connecticut 5373   [studies]
Delaware 1378   [studies]
District of Columbia 3745   [studies]
Florida 14433   [studies]
Georgia 8788   [studies]
Hawaii 1398   [studies]
Idaho 1740   [studies]
Illinois 11634   [studies]
Indiana 6646   [studies]
Iowa 3392   [studies]
Kansas 4423   [studies]
Kentucky 4747   [studies]
Louisiana 4824   [studies]
Maine 1324   [studies]
Maryland 12691   [studies]
Massachusetts 12119   [studies]
Michigan 9072   [studies]
Minnesota 7649   [studies]
Mississippi 2112   [studies]
Missouri 8714   [studies]
Montana 1597   [studies]
Nebraska 3864   [studies]
Nevada 2932   [studies]
New Hampshire 1639   [studies]
New Jersey 7285   [studies]
New Mexico 2326   [studies]
New York 17830   [studies]
North Carolina 11905   [studies]
North Dakota 1504   [studies]
Ohio 12888   [studies]
Oklahoma 4280   [studies]
Oregon 5621   [studies]
Pennsylvania 13964   [studies]
Rhode Island 2648   [studies]
South Carolina 6021   [studies]
South Dakota 1321   [studies]
Tennessee 8512   [studies]
Texas 17843   [studies]
Utah 4546   [studies]
Vermont 1437   [studies]
Virginia 7070   [studies]
Washington 8116   [studies]
West Virginia 1398   [studies]
Wisconsin 5217   [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.