[1] Univ Colorado, Sch Med, Div Pulm Sci & Crit Care Med, Aurora, CO USA
[2] Cox Hlth Syst, Springfield, MO USA
[3] Univ Chicago, Div Biol Sci, Pritzker Sch Med, Dept Pediat,Sect Pediat Sleep Med, Chicago, IL 60637 USA
[4] Univ Chicago, Div Biol Sci, Pritzker Sch Med, Dept Pediat,Sect Pulmonol, Chicago, IL 60637 USA
[5] Rush Univ, Med Ctr, Ctr Clin Res & Scholarship, Chicago, IL 60612 USA
[6] Rush Univ, Coll Nursing, Chicago, IL 60612 USA
[7] Virginia Commonwealth Univ Hlth Syst, Med Coll Virginia Hosp & Phys, Div Pulm Dis & Crit Care Med, Box 980050, Richmond, VA 23298 USA