[1] Univ Pittsburgh, Dept Med Geriatr & Cardiol, Pittsburgh, PA 15213 USA
[2] VA Pittsburgh Healthcare Syst, GRECC, Pittsburgh, PA USA
[3] Univ Connecticut, Sch Med, UConn Ctr Aging, UConn Hlth, Farmington, CT USA
[4] Buck Inst Res Aging, Novato, CA USA
[5] Univ Calif San Francisco, Div Geriatr, San Francisco, CA USA
[6] Mayo Clin, Dept Med, Div Gen Internal Med, Rochester, MN USA
[7] Mayo Clin, Dept Physiol & Biomed Engn, Rochester, MN USA
[8] Univ Texas Med Branch, Sealy Ctr Aging, Galveston, TX USA
[9] Baylor Coll Med, Dept Med Geriatr & Cardiovasc Sci, Houston, TX USA
[10] Einstein Inst Aging Res, Bronx, NY USA
[11] Albert Einstein Coll Med, Einstein NSC & Glenn Med Ctr, Bronx, NY USA
[12] UT Southwestern Med Ctr, Dept Internal Med, Div Cardiol, Dallas, TX USA
[13] Harvard Med Sch, Brigham & Womens Hosp, Cardiovasc Div, Boston, MA USA
[14] Wake Forest Univ, Bowman Gray Sch Med, Dept Internal Med, Cardiovasc Med & Geriatr, Winston Salem, NC USA
[15] NIA, Bethesda, MD 21224 USA
[16] Univ Pittsburgh, Med Ctr, Div Geriatr Med, Sect Geriatr Cardiol, 3471 Fifth Ave,Suite 500, Pittsburgh, PA 15213 USA
[17] NIA, Biosci Res Ctr, 251 Bayview Blvd, Baltimore, MD 21224 USA