[1] Johns Hopkins Univ, Sch Med, Ctr Transformat Geriatr Res, Div Geriatr Med & Gerontol, Baltimore, MD 21218 USA
[2] Mayo Clin, Dept Quantitat Hlth Sci, Div Clin Trials & Biostat, Rochester, MN USA
[3] Mayo Clin, Dept Quantitat Hlth Sci, Div Epidemiol, Rochester, MN USA
[4] Mayo Clin, Robert D & Patricia E Kern Ctr Sci Hlth Care Deliv, Rochester, MN USA
[5] Mayo Clin, Dept Cardiovasc Med, Rochester, MN USA
[6] Mayo Clin, Dept Neurol, Rochester, MN USA
[7] Mayo Clin, Womens Hlth Res Ctr, Rochester, MN USA
[8] Johns Hopkins Univ, Ctr Transformat Geriatr Res, Div Geriatr Med & Gerontol, Sch Med, Mason F Lord Ctr Tower,7th Floor,5505 Eastern Ave, Baltimore, MD 21224 USA