1. Center for the Study of Aging and Human DevelopmentDuke University Medical CenterDurhamNCUSA
2. Department of PsychologyUniversity of North CarolinaChapel HillNCUSA
3. Department of Biometry and BioinformaticsDuke University Medical CenterDurhamNCUSA
4. Department of Community and Family MedicineDuke University Medical CenterDurhamNCUSA
5. Department of Psychology and Center for Epidemiologic StudiesUtah State UniversityLoganUTUSA
6. Department of Family Consumer and Human DevelopmentUtah State UniversityLoganUTUSA
7. VA Puget Sound Health Care System and Department of Psychiatry and Behavioral SciencesUniversity of Washington School of MedicineSeattleWAUSA
8. Department of Psychiatry and Behavioral SciencesDuke University Medical CenterDurhamNCUSA