1. Department of Dermatology, Columbia University, New York, NY 10032, USA.
2. Department of Dermatology, University Medical Center Groningen, University of Groningen, Groningen 9700 RB, the Netherlands.
3. Department of Dermatology, The Jikei University School of Medicine, Tokyo 105-8461, Japan.
4. Department of Pathology and Cell Biology, Columbia University, New York, NY 10032, USA.
5. Department of Genetics and Development, Columbia University, New York, NY 10032, USA.