1. Deployment Health Research Department, Naval Health Research Center, San Diego, California
2. Leidos, San Diego, California
3. Social Science Research Center, Mississippi State University, Starkville
4. Division of Biostatistics and Bioinformatics, Department of Family Medicine and Public Health, University of California, San Diego, La Jolla
5. Center for Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, Maryland
6. Office of the Army Surgeon General, Falls Church, Virginia
7. for the Millennium Cohort Study Team