1 Department of Dermatology, Radboud University Medical Center, Nijmegen, The Netherlands.
2 Stem Cell Laboratory, Department of Women and Children's Health, Kings College, London, United Kingdom.
3 Epidermal Biology Laboratory, Department of Dermatology, Venereology and Allergology, Medical University of Innsbruck, Innsbruck, Austria.
4 Wound Healing and Regenerative Medicine Research Program, University of Miami, Miami, Florida, USA.
5 Division of Biotherapeutics, Leiden University, Leiden, The Netherlands.
6 Department of Dermatology, University of California, San Francisco, San Francisco, California, USA.
7 Department of Dermatology, University of California, San Francisco, San Francisco, California, USA; Dermatology Service, Veterans Affairs Health Care System, San Francisco, California, USA. Electronic address: thea.mauro@ucsf.edu.