3 Department of Medicine, VA Boston Healthcare System, Boston, Massachusetts, USA; Division of Genetics, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA; Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA.
5 Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
6 St John's Institute of Dermatology, Guy's Hospital, King's College London, London, UK.
7 Division of Blood and Marrow Transplantation and Cellular Therapy, Department of Pediatrics, University of Minnesota M Health Fairview Masonic Children's Hospital, Minneapolis, Minnesota, USA.
8 Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, Massachusetts, USA; Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA; School of Medical and Health Sciences, Edith Cowan University, Perth, Western Australia, Australia.