[1] Duke Univ, Dept Med, Div Pulm Allergy & Crit Care, Sch Med, Durham, NC USA
[2] Virginia Commonwealth Univ, Dept Med, Div Pulm & Crit Care & Infect Dis, Richmond, VA USA
[3] Lahey Hosp & Med Ctr, Dept Med, Div Pulm & Crit Care & Infect Dis, Burlington, MA USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Med, Div Pulm & Crit Care, Houston, TX USA
[5] Vanderbilt Univ, Dept Med, Div Allergy Pulm & Crit Care, Nashville, TN USA
[6] Henry Ford Hlth Syst, Div Pulm & Crit Care, Dept Med, Detroit, MI USA
[7] Univ Massachusetts, Dept Med, Div Pulm & Crit Care, Worcester, MA USA
[8] Texas State Univ, Dept Resp Care, Round Rock, TX USA
[9] Mayo Clin, Div Pulm & Crit Care, Dept Med, Rochester, MN USA
[10] Univ Arizona, Dept Med, Div Pulm & Crit Care, Phoenix, AZ USA