1. Department of Epidemiology, University of Nebraska Medical Center, Omaha, NE, USA
2. Department of Civil Engineering, University of Nebraska–Lincoln, Omaha, NE, USA
3. Department of Environmental, Agricultural & Occupational Health, University of Nebraska Medical Center, Omaha, NE, USA
4. Division of Hematology/Oncology, Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, USA
5. Department of Geography & Geology, University of Nebraska Omaha, Omaha, NE, USA
6. Idaho Water Resources Research Institute, University of Idaho, Moscow, ID, USA