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209268 Studies found for: Single

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Map Legend
Region Name Number of Studies
World [map] 209,268
North America 92,190
United States 83,086 [studies]
Alabama 4,893 [studies]
Alaska 431 [studies]
Arizona 6,476 [studies]
Arkansas 2,673 [studies]
California 20,720 [studies]
Colorado 6,395 [studies]
Connecticut 4,584 [studies]
Delaware 1,111 [studies]
District of Columbia 2,993 [studies]
Florida 13,555 [studies]
Georgia 7,484 [studies]
Hawaii 992 [studies]
Idaho 1,386 [studies]
Illinois 9,973 [studies]
Indiana 5,359 [studies]
Iowa 2,839 [studies]
Kansas 3,807 [studies]
Kentucky 4,006 [studies]
Louisiana 3,672 [studies]
Maine 1,009 [studies]
Maryland 9,659 [studies]
Massachusetts 11,204 [studies]
Michigan 8,160 [studies]
Minnesota 7,140 [studies]
Mississippi 1,645 [studies]
Missouri 7,760 [studies]
Montana 1,169 [studies]
Nebraska 3,150 [studies]
Nevada 2,364 [studies]
New Hampshire 1,467 [studies]
New Jersey 6,260 [studies]
New Mexico 1,774 [studies]
New York 16,454 [studies]
North Carolina 10,446 [studies]
North Dakota 1,113 [studies]
Ohio 11,404 [studies]
Oklahoma 3,288 [studies]
Oregon 4,663 [studies]
Pennsylvania 12,512 [studies]
Rhode Island 1,985 [studies]
South Carolina 4,818 [studies]
South Dakota 1,165 [studies]
Tennessee 7,601 [studies]
Texas 17,364 [studies]
Utah 4,067 [studies]
Vermont 969 [studies]
Virginia 5,911 [studies]
Washington 6,982 [studies]
West Virginia 1,236 [studies]
Wisconsin 4,616 [studies]
Wyoming 322 [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.