1. Department of Dermatology Ren Ji Hospital, School of Medicine, Shanghai Jiaotong University Shanghai 200127China
2. Department of Dermatology University of California San Diego La Jolla CA 92093 USA
3. State Key Laboratory of Oncogenes and Related Genes Renji‐Med X Clinical Stem Cell Research Center Ren Ji Hospital Shanghai 200127China
4. Department of Dermatology Ruijin Hospital School of Medicine Shanghai Jiaotong University Shanghai 200127 China