[1] Tennessee Valley Healthcare Syst, Geriatr Res Educ Clin Ctr, Vet Hlth Adm, Nashville, TN USA
[2] Vanderbilt Univ, Dept Med, Nashville, TN USA
[3] Roudebush Vet Affairs Med Ctr, Ctr Hlth Informat & Commun Hlth Serv & Res Dev, Indianapolis, IN USA
[4] Purdue Univ, Dept Pharm Practice, W Lafayette, IN 47907 USA
[5] Indiana Univ Sch Med, Dept Internal Med & Geriatr, Indianapolis, IN 46202 USA
[6] Hlth Serv Res & Dev Stroke Qual Enhancement Res I, Indianapolis, IN USA
[7] Regenstrief Inst Hlth Care, Hlth Serv Res Sect, Indianapolis, IN USA
[8] Greater Los Angeles Vet Affairs Med Ctr, Dept Neurol, Los Angeles, CA USA
[9] Univ Calif Los Angeles, David Geffen Sch Med, Dept Neurol, Los Angeles, CA 90095 USA