[1] Childrens Hosp Pittsburgh UPMC, Div Pediat Pulm Med Allergy & Immunol, Pittsburgh, PA 15224 USA
[2] Saitama Med Univ Hosp & Inst, Saitama, Japan
[3] Lovelace Resp Res Inst, Albuquerque, NM USA
[4] Univ Rochester, Med Ctr, Rochester, NY 14642 USA
[5] Brigham & Womens Hosp, Channing Lab, Boston, MA 02115 USA
[6] Hosp Nacl Ninos Dr Carlos Saenz Herrera, Div Pediat Pulmonol, San Jose, Costa Rica
[7] Brigham & Womens Hosp, Div Pulm Crit Care Med, Boston, MA 02115 USA
[8] Brigham & Womens Hosp, Dept Med, Boston, MA 02115 USA
[9] Harvard Univ, Sch Med, Dept Med, Boston, MA USA
[10] Brigham & Womens Hosp, Dept Radiol, Boston, MA 02115 USA
[11] Univ Bergen, Inst Med, Bergen, Norway
[12] Univ Bergen, Haukeland Univ Hosp, Bergen, Norway
[13] GlaxoSmithKline Res & Dev Ltd, Res Triangle Pk, NC USA
[14] Univ Cambridge, Cambridge Inst Med Res, Cambridge, England
[15] Univ Miami, Dept Pediat, Div Pediat Pulmonol, Miami, FL 33152 USA
[16] Brigham & Womens Hosp, Ctr Genom Med, Boston, MA 02115 USA