1. Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, Irvine, California.
2. Institute for Immunology, University of California, Irvine, Irvine, California.
3. Department of Dermatology, University Hospital Düsseldorf, Düsseldorf, Germany.
4. School of Medicine, University of Baja California, Mexicali, Mexico.