Affiliations

• ¹ Department of Pediatrics, Nationwide Children's Hospital, Ohio State University, Columbus, OH 43210, USA. Electronic address: karen.mccoy@nationwidechildrens.org.
• ² Department of Pulmonology, University Medical Center Utrecht, Utrecht, Netherlands.
• ³ Department of Medicine and Pediatrics, National Jewish Health, Denver, CO, USA.
• ⁴ Vertex Pharmaceuticals, Boston, MA, USA.
• ⁵ Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, WA, USA.
• ⁶ Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
• ⁷ Division of Pediatric Pulmonology, Allergy, Immunology, and Sleep Medicine, New York Medical College, New York, NY, USA.