[1] Vanderbilt Univ, Sch Med, Ctr Qual Aging, Nashville, TN 37212 USA
[2] Vanderbilt Univ, Sch Med, Ctr Hlth Serv Res, Nashville, TN 37212 USA
[3] Vanderbilt Univ, Sch Med, Div Gen Internal Med & Publ Hlth, Dept Med, Nashville, TN 37212 USA
[4] Vanderbilt Univ, Sch Med, Div Crit Care, Dept Anesthesiol, Nashville, TN 37212 USA
[5] Vanderbilt Univ, Sch Med, Dept Pharmaceut Serv, Nashville, TN 37212 USA
[6] Vanderbilt Univ, Sch Med, Dept Biostat, Nashville, TN 37212 USA
[7] Vanderbilt Univ, Sch Med, Dept Emergency Med, Nashville, TN 37212 USA
[8] Tennessee Valley Healthcare Syst, Dept Vet Affairs VA Med Ctr, Clin Res Training Ctr Excellence, Nashville, TN USA
[9] Tennessee Valley Healthcare Syst, Dept Vet Affairs VA Med Ctr, Anesthesia Serv, Nashville, TN USA
[10] Tennessee Valley Healthcare Syst, Dept Vet Affairs VA Med Ctr, Geriatr Res Educ & Clin Ctr GRECC Serv, Nashville, TN USA
[11] Univ Tennessee, Hlth Sci Ctr, Coll Med, Memphis, TN USA
[12] Penn State Univ, Sch Nursing, University Pk, PA 16802 USA