[1] Boston Univ, Sch Med, Dept Med, Boston, MA 02118 USA
[2] NIAID, Lab Malaria & Vector Res, NIH, 9000 Rockville Pike, Bethesda, MD 20892 USA
[3] NHLBI, Pulm Branch, Bldg 10, Bethesda, MD 20892 USA
[4] Univ Pittsburgh, Dept Med, Div Pulm Asthma & Crit Care Med, Pittsburgh, PA USA
[5] Howard Univ, Coll Med, Washington, DC USA
[6] Tufts Med Ctr, Div Pulm Crit Care & Sleep Med, Boston, MA 02111 USA
[7] NHLBI, Sickle Cell Branch, Bethesda, MD USA
[8] Boston Univ, Sch Med, Pulm Ctr, Boston, MA USA