United States loading map - please wait...Map could not be loaded - please enable Javascript!→ more information Homer, New York, USA: 42.637014, -76.178817 Snow Hill, New Jersey, USA: 39.866503, -75.028225 Grand Crossing, Chicago, Illinois, USA: 41.763437, -87.595334 Hineston, Louisiana, USA: 31.143518, -92.758759 Princess Anne County, Virginia, USA: 36.703660, -76.055603 Dayton, Illinois, USA: 41.384537, -88.794250 Gravesend, Brooklyn, New York, USA: 40.591017, -73.977126 Sinking Valley, Pennsylvania, USA: 40.614233, -78.161954 Coventry, NY, United States: 42.315910, -75.638520 The following locations have registered studies: Illinois Louisiana New Jersey New York North Carolina Pennsylvania Virginia Search for a study: