1. Department of Dermatology College of Medicine Korea University 148 Gurodong‐ro, Guro‐gu Seoul 08308 Korea
2. Division of Oncology/Hematology Department of Internal Medicine College of Medicine Korea University 148 Gurodong‐ro, Guro‐gu Seoul 08308 Korea
3. Department of Pathology College of Medicine Korea University 148 Gurodong‐ro, Guro‐gu Seoul 08308 Korea