1. Department of Dermatology; First Affiliated Hospital; Harbin Medical University; Harbin 150001 P. R. China
2. State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 P. R. China
3. School of Stomatology; Jilin University; Changchun 130041 P. R. China