1. Department of Dermatology, University of California, San Diego, La Jolla, CA 92093, USA.
2. Scripps Institute of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA.
3. The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA.
4. National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.