1. Department of Aging and Geriatric Research; University of Florida College of Medicine; Gainesville; Florida
2. Department of Biostatistical Sciences; Wake Forest School of Medicine; Winston-Salem; North Carolina
3. Institut du Vieillissement; Université de Toulouse; Toulouse; France
4. Stanford Prevention Research Center; Stanford University Medical School; Stanford; California
5. Pennington Biomedical Research Center; Louisiana State University System; Baton Rouge; Louisiana