1 From the Division of Pulmonary, Allergy, and Critical Care Medicine, Section of Allergy-Immunology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.
2 Division of Allergy-Immunology, Department of Pediatrics, Penn State Children's Hospital, Hershey, Pennsylvania.
3 Division of Allergy-Immunology, Department of Pediatrics, Penn State Children's Hospital, Hershey, Pennsylvania. Electronic address: ahorwitz@pennstatehealth.psu.edu.