[1] Beth Israel Deaconess Med Ctr, Hebrew SeniorLife, Inst Aging Res, Boston, MA 02215 USA
[2] CHU Limoges, Geriatr Emergency Dept, Limoges, France
[3] Univ Limoges, EA HAVAE 6310, Univ Hosp Ctr Limoges, Limoges, France
[4] Hebrew SeniorLife, Inst Aging Res, Boston, MA USA
[5] Harvard Univ, Sch Med, Boston, MA USA
[6] Brown Univ, Sch Publ Hlth, Providence, RI 02912 USA
[7] Brigham & Womens Hosp, Stroke Div, Dept Neurol, Boston, MA 02115 USA