[1] Univ Massachusetts, Sch Med, Div Geriatr Med, Worcester, MA 01605 USA
[2] Univ New England, Coll Osteopath Med, Biddeford, ME USA
[3] Hebrew SeniorLife Inst Aging Res, Boston, MA USA
[4] PennState Coll Med, Dept Publ Hlth Sci, Hershey, PA USA
[5] Univ Texas MD Anderson Canc Ctr, Div Gen Internal Med, Houston, TX 77030 USA
[6] Indiana Univ, Div Gen Internal Med & Geriatr, Indianapolis, IN 46204 USA
[7] Indiana Univ, Ctr Aging Res, Regenstrief Inst Inc, Indianapolis, IN 46204 USA