1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
2. Missouri Breaks Industries Research Inc., Eagle Butte, South Dakota, USA
3. Indian Health Service, Rockville, Maryland, USA
4. Environmental Resource Department, Oglala Sioux Tribe, Pine Ridge, South Dakota, USA
5. Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
6. Department of Environmental Health Science, Mailman School of Public Health, Columbia University, New York, New York, USA
7. Biomarker, Biochemistry, and Biorepository Core, Medstar Health, Washington, District of Columbia, USA
8. Department of Medicine, School of Medicine, Georgetown University, Washington, District of Columbia, USA