[1] Vet Hlth Adm, Valley Healthcare Syst Geriatr Res Educ & Clin Ct, Nashville, TN USA
[2] Vanderbilt Univ, Med Ctr, Dept Radiol & Radiol Sci, 1161 21st Ave South, Nashville, TN 37232 USA
[3] Vanderbilt Ingram Canc Ctr, Nashville, TN USA
[4] Vanderbilt Univ, Med Ctr, Dept Internal Med, Div Hematol Oncol, Nashville, TN USA
[5] Loyola Univ Chicago, Stritch Sch Med, Maywood, IL USA
[6] Vanderbilt Univ, Dept Thorac Surg, Med Ctr, Nashville, TN USA
[7] Vet Hlth Adm, Tennessee Valley Healthcare Syst, Surg Serv, Nashville, TN USA
[8] Vanderbilt Univ, Med Ctr, Dept Allergy Pulm & Crit Care Med, Nashville, TN USA
[9] Vet Hlth Adm, Tennessee Valley Healthcare Syst, Med Serv, Nashville, TN USA
[10] Vanderbilt Univ, Med Ctr, Dept Internal Med, Div Gen Internal Med & Publ Hlth, Nashville, TN USA