1. From the Washington University School of Medicine, St. Louis (M.C.); David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles (J. Corren), and Peninsula Research Associates, Rolling Hills Estates (L.S.) — both in California; Oxford Respiratory National Institute for Health Research Biomedical Research Centre, University of Oxford, Oxford, United Kingdom (I.D.P.); Fundación CIDEA (Centro de Investigación de Enfermedades Alérgicas y Respiratorias), Buenos Aires (J.M.); the...