3 Pediatric Pulmonology and Allergy Department, CHU Lille, Hôpital Jeanne de Flandre, Université de Lille, Lille, France.
4 Division of Allergy, Immunology and Pulmonary Medicine, Monroe Carell Jr. Children's Hospital at Vanderbilt University Medical Center, Nashville, Tenn.
5 Sanofi, Cambridge, Mass.
6 Sanofi, Bridgewater, NJ.
7 Regeneron Pharmaceuticals Inc., Tarrytown, New York, NY.