1. Geisel School of Medicine at Dartmouth, Lebanon, NH, USA,
2. National Institute of Environmental Health Sciences, Durham, NC, USA,
3. Department of Earth Sciences, Dartmouth College, Hanover, NH, USA,
4. McKing Consulting Corp, Atlanta, GA, USA,
5. Centers for Disease Control and Prevention (CDC), Agency for Toxic Substances and Disease Registry (ATSDR), Atlanta, GA, USA