[1] Massachusetts Gen Hosp, Dermatopathol Unit, Dept Pathol, Boston, MA 02114 USA
[2] Massachusetts Gen Hosp, Dept Dermatol, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Dept Pathol, Boston, MA 02115 USA
[4] Harvard Univ, Sch Med, Dept Dermatol, Boston, MA 02115 USA
[5] Boston Univ, Sch Med, Dept Dermatol, Boston, MA 02118 USA