1 Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, California, USA; Stem Cell Program, University of California, San Diego, La Jolla, California, USA; Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
2 Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, California, USA; Stem Cell Program, University of California, San Diego, La Jolla, California, USA.
3 Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, California, USA; Stem Cell Program, University of California, San Diego, La Jolla, California, USA. Electronic address: gsen@ucsd.edu.