1 Tufts University School of Medicine, Boston, Massachusetts; Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts.
2 Department of Dermatology, University of Missouri School of Medicine, Columbia, Missouri.
3 Department of Dermatology, Brigham and Women's Hospital, Chestnut Hill, Massachusetts; Harvard Medical School, Boston, Massachusetts.
4 Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts. Electronic address: Jdyu@partners.org.