[1] Univ Iowa, Roy J & Lucille A Carver Coll Med, Dept Dermatol, Iowa City, IA 52242 USA
[2] Univ Iowa, Roy J & Lucille A Carver Coll Med, Dept Pathol, Iowa City, IA USA
[3] Dana Farber Canc Inst, Div Med Oncol, Boston, MA 02115 USA
[4] Massachusetts Gen Hosp, Dept Pathol, Boston, MA 02114 USA
[5] Harvard Univ, Sch Med, Dept Med, Cambridge, MA 02138 USA
[6] Harvard Univ, Sch Med, Dept Pathol, Cambridge, MA 02138 USA