[1] Univ Alabama Birmingham, Div Pulm Allergy & Crit Care Med, Dept Med, Birmingham, AL 35294 USA
[2] Univ Alabama Birmingham, Hlth Serv Outcomes & Effectiveness Res Training P, Dept Med, Birmingham, AL 35294 USA
[3] Univ Alabama Birmingham, Lung Hlth Ctr, Dept Med, Birmingham, AL 35294 USA
[4] Univ Alabama Birmingham, Div Gerontol Geriatr & Palliat Care, Dept Med, Birmingham, AL 35294 USA
[5] Univ Alabama Birmingham, Sch Nursing, Birmingham, AL 35294 USA
[6] Univ Alabama Birmingham, Sch Hlth Profess, Birmingham, AL 35294 USA
[7] Birmingham Vet Affairs Med Ctr, Birmingham, AL USA