1. National Institute of Environmental Health Sciences, Laboratory of Respiratory Biology, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA;
2. University of North Carolina–Charlotte, Department of Kinesiology, Charlotte, North Carolina, USA;
3. Michigan State University, Department of Pathobiology and Diagnostic Investigation, Center for Integrative Toxicology, East Lansing, Michigan, USA;
4. Center for Environmental Medicine, Asthma and Lung Biology, Department of Pediatrics, and Division of Immunology and Infectious Disease, University of North Carolina–Chapel Hill School of Medicine, Chapel Hill, North Carolina, USA