1 Division of Allergy and Immunology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Tex. Electronic address: drew.bird@utsouthwestern.edu.
2 Department of Pediatrics, Children's Medical Center Food Allergy Center, Dallas, Tex.
3 Division of Allergy and Immunology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Tex.