1. School of Medicine, Tufts University, Boston, MA 02111, USA
2. Dermatology Program, Boston Children’s Hospital, Boston, MA 02115, USA
3. Department of Dermatology, Massachusetts General Hospital, Boston, MA 02114, USA
4. School of Medicine, Harvard University, Boston, MA 02115, USA
5. School of Medicine, Duke University, Durham, NC 27710, USA
6. Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA