[1] Ohio State Univ, Coll Nursing, Columbus, OH 43210 USA
[2] Vanderbilt Univ, Dept Med Pulm & Crit Care Crit Illness Brain Dysfu, Med Ctr, Nashville, TN USA
[3] Vanderbilt Univ, Hosp Med, Ctr Qual Aging, Dept Med Gen Internal Med & Publ Hlth,Med Ctr, Nashville, TN USA
[4] Geriatr Res Educ & Clin Ctr, Clin Res Training Ctr Excellence, Vet Affairs Tennessee Valley Healthcare Syst, Nashville, TN USA
[5] Concept Syst Inc, Ithaca, NY USA
[6] Univ Nebraska, Coll Nursing, Med Ctr, Omaha, NE USA