[1] Brigham & Womens Hosp, Dept Pathol, Div Dermatopathol, Boston, MA USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Massachusetts Gen Hosp, Div Dermatopathol, Boston, MA 02114 USA
[4] St Thomas Hosp, St Johns Inst Dermatol, Dept Dermatopathol, London, England
[5] Mem Sloan Kettering Canc Ctr, New York, NY 10021 USA