1. U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Research Triangle Park, North Carolina
2. Centers for Disease Control and Prevention, National Center for HIV, STD, and TB Prevention, Division of TB Elimination, Atlanta, Georgia
3. U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, Cincinnati, Ohio
4. U.S. Environmental Protection Agency, Region 10 Laboratory, Port Orchard, Washington
5. Clark County Water Reclamation District, Las Vegas, Nevada