[1] Regenstrief Inst Inc, Indianapolis, IN 46202 USA
[2] Indiana Univ, Ctr Aging Res, Indianapolis, IN 46204 USA
[3] Indiana Univ, Sch Med, Dept Med, Indianapolis, IN 46204 USA
[4] Univ Kent, Kent Inst Med & Hlth Sci, Canterbury CT2 7NZ, Kent, England
[5] Indiana Univ, Sch Med, Dept Psychiat, Indianapolis, IN 46204 USA