1. Department of Pathology and Laboratory Medicine (A.T.S., B.Z.) and Department of Medicine (A.T.S.), University of Tennessee, Memphis, Tennessee 38103;
2. Department of Histology (M.A.Z.), Medical University of Gdańsk, 80-210 Gdańsk, Poland;
3. Centre for Skin Sciences (D.J.T.), School of Life Sciences, University of Bradford, Bradford, West Yorkshire BD7 1DP, United Kingdom;
4. Department of Molecular Physiology and Pharmacology, Biochemistry and Internal Medicine (T.C.T.), Tufts University School of Medicine, Boston, Massachusetts 02111;
5. The Clayton Foundation Laboratories for Peptide Biology (J.R.), The Salk Institute, La Jolla, California 92037