1. Children’s Environmental Health Initiative, University of Illinois Chicago, Chicago, Illinois, USA
2. Department of Mathematics, Applied Mathematics, and Statistics, Case Western Reserve University, Cleveland, Ohio, USA
3. Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, Maryland, USA
4. Department of Economics, Appalachian State University, Boone, North Carolina, USA
5. Department of Pediatrics, University of Illinois Chicago, Chicago, Illinois, USA