1. a Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
2. b Division of Medical Oncology, Department of Medicine, Stony Brook University Cancer Center, Stony Brook, New York, USA
3. c Dermatology Unit, Gustave-Roussy Institute, Villejuif, France
4. d Division of Hematology/Oncology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
5. e Dermatology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
6. f Department of Dermatology, Eberhard Karls University, Tübingen, Germany
7. g Department of Dermatology, University of Kiel, Kiel, Germany
8. h Division of Hematology/Oncology, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
9. i Georgetown Dermatology, Washington, District of Columbia, USA
10. j Pennsylvania State College of Medicine, Hershey, Pennsylvania, USA
11. k Cleveland Clinic Taussig Cancer Center, Cleveland, Ohio USA
12. 1 Our Lady of Mercy Medical Center, Comprehensive Cancer Center, New York Medical College, Bronx, New York, USA