Allergic Skin Diseases.

Ong PY Division of Clinical Immunology and Allergy, Children's Hospital Los Angeles, Department of Pediatrics, University of Southern California Keck School of Medicine, 4650 Sunset Boulevard, MS 75, Los Angeles, CA 90027, USA. Electronic address: pyong@chla.usc.edu.
Schmid-Grendelmeier P Allergy Unit, Department of Dermatology, University Hospital of Zurich, Christine-Kühne Center for Allergy Research and Education (CK-CARE), Gloriastrasse 31, 8091 Zurich, Switzerland. Electronic address: peter.schmid@usz.ch.