By Martin M. Black, MD, FRCP, FRCPath, Professor of Dermatological Immunopathology, St. John's Institute of Dermatology, Guy's King's and St Thomas' School of Medicine, St. Thomas Hospital, London, UK; Christina Ambros-Rudolph, MD; Libby Edwards, MD, Chief of Dermatology, Carolinas Medical Center, Charlotte, NC; Associate Clinical Professor, Department of Dermatology, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, NC; and Peter J. Lynch, MD, Professor and Chair, Department of Dermatology, University of California, Davis, School of Medicine, Davis, CA |