1. Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
2. North Carolina Agromedicine Institute, Greenville, North Carolina, USA
3. Environmental Health Sciences Program, Department of Health Education and Promotion, College of Health and Human Performance, East Carolina University, Greenville, North Carolina, USA
4. Department of Geography, East Carolina University, Greenville, North Carolina, USA
5. Department of Health Education and Promotion, College of Health and Human Performance, East Carolina University, Greenville, North Carolina, USA
6. Department of Chemistry, East Carolina University, Greenville, North Carolina, USA