1. Department of Family and Community Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
2. Center for Worker Health, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
3. Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
4. Department of Radiology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
5. Center for Genomics and Personalized Medicine Research, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
6. Department of Environmental and Occupational Health, Rollins School of Public Health of Emory University, Atlanta, Georgia, USA
7. Department of Epidemiology and Prevention, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA