1. Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, USA
2. Department of Environmental and Occupational Health, and
3. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
4. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
5. Division of Neonatology, School of Medicine, Emory University, Atlanta, Georgia, USA
6. The Apnea Center, Children’s Healthcare of Atlanta at Egleston, Atlanta, Georgia, USA