[1] Dana Farber Canc Inst, Med Oncol, Boston, MA USA
[2] Univ Klinikum Essen, Dermatol, Essen, Germany
[3] Harvard Med Sch, Lab Syst Pharmacol, Boston, MA USA
[4] Univ Hosp Essen, Dermatol, Essen, Germany
[5] Univ Hosp Essen, Dermatol, Westdeutsch Tumorzentrum, Essen, Germany
[6] Brigham & Womens Hosp, Dermatol, Boston, MA USA