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Map Legend
Region Name Number of Studies
World [map] 156
North America 64
United States 59 [studies]
Alabama 9 [studies]
Arizona 18 [studies]
Arkansas 7 [studies]
California 20 [studies]
Colorado 12 [studies]
Connecticut 5 [studies]
District of Columbia 6 [studies]
Florida 27 [studies]
Georgia 16 [studies]
Hawaii 1 [studies]
Idaho 7 [studies]
Illinois 7 [studies]
Indiana 5 [studies]
Iowa 1 [studies]
Kansas 5 [studies]
Kentucky 10 [studies]
Louisiana 7 [studies]
Maryland 4 [studies]
Massachusetts 5 [studies]
Michigan 4 [studies]
Missouri 11 [studies]
Nebraska 7 [studies]
Nevada 7 [studies]
New Hampshire 3 [studies]
New Jersey 13 [studies]
New Mexico 2 [studies]
New York 12 [studies]
North Carolina 19 [studies]
Ohio 17 [studies]
Oklahoma 8 [studies]
Oregon 18 [studies]
Pennsylvania 19 [studies]
Rhode Island 4 [studies]
South Carolina 9 [studies]
Tennessee 12 [studies]
Texas 16 [studies]
Utah 9 [studies]
Vermont 2 [studies]
Virginia 12 [studies]
Washington 15 [studies]
Wisconsin 5 [studies]

Click on a [map] link to show a map of that region.

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.