[1] Emory Univ, Dept Med, Atlanta, GA 30322 USA
[2] Texas Tech Univ HSC, Dept Med, Midland, TX USA
[3] Piedmont Healthcare, Dept Family Med, Columbus, GA USA
[4] Emory Univ, Dept Emergency Med, Atlanta, GA 30322 USA
[5] Emory Univ, Div Pulm Allergy & Crit Care, Atlanta, GA 30322 USA
[6] Emory Univ, Dept Pulm & Crit Care, Atlanta, GA 30322 USA