1. Department of Dermatology; Peking University First Hospital; 8 Xishiku Street Xicheng District Beijing 100034 China
2. Beijing Key Laboratory of Molecular Diagnosis of Dermatoses; Beijing China
3. Department of Dermatology; Beijing Jishuitan Hospital; Beijing China
4. Department of Neurology; Peking University First Hospital; 8 Xishiku Street Xicheng District Beijing 100034 China