1. Department of Psychiatry and Behavioral Neurobiology; University of Alabama at Birmingham; Birmingham AL USA
2. Department of Biostatistics; University of Alabama at Birmingham; Birmingham AL USA
3. Yale Center for Sleep Medicine; Department of Medicine; Yale University School of Medicine; New Haven CT USA
4. Department of Psychiatry; Indiana University School of Medicine; Indianapolis IN USA
5. Department of Epidemiology; University of Alabama at Birmingham; Birmingham AL USA
6. Section of Chronic Disease Epidemiology; Department of Epidemiology and Public Health; Yale University School of Medicine; New Haven CT USA
7. Department of Medicine; University of Alabama at Birmingham; Birmingham AL USA