1. Laboratory of Molecular Immunoregulation, Division of Basic Sciences,
2. Intramural Research Support Program, SAIC Frederick, National Cancer Institute–Frederick Cancer Research and Development Center, Frederick, MD 21702–1201, USA.
3. Allegheny University of Health Sciences, Pittsburgh, PA 15212, USA.
4. Magainin Research Institute, 5110 Campus Drive, Plymouth Meeting, PA 19642, USA.
5. Department of Dermatology, Christian Albrechts University of Kiel, Schittenhelmstrasse 7, D-24105 Kiel, Germany.