[1] Emory Univ, Dept Med, Div Pulm Allergy Crit Care & Sleep Med, Sch Med, Atlanta, GA 30322 USA
[2] Atlanta Vet Affairs Hlth Care Syst, Decatur, GA 30033 USA
[3] Ralph H Johnson Vet Affairs Hosp, Hlth Equ & Rural Outreach Innovat Ctr HERO, Charleston, SC 29401 USA
[4] Med Univ South Carolina, Div Pulm & Crit Care, Thorac Oncol Res Grp, Charleston, SC 29401 USA
[5] Emory Univ Sch Med, Div Pulm Allergy Crit Care & Sleep Med, Sch Med, 615 Michael St NE Ste 205, Atlanta, GA 30322 USA