1. Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
2. U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri, USA
3. Department of Forestry, School of Natural Resources, University of Missouri, Columbia, Missouri, USA
4. Department of Family and Community Medicine, and
5. Department of Obstetrics, Gynecology and Women’s Health, School of Medicine, University of Missouri, Columbia, Missouri, USA