1. Shanghai Skin Disease Hospital, Shanghai Engineering Research Center for Topical Chinese Medicine, School of Medicine, Tongji University, Shanghai 200443, P. R. China
2. School of Life Science and Technology, Tongji University, Shanghai 200092, P. R. China
3. School of Pharmacy, Fudan University, Shanghai 201203, P. R. China
4. Key Laboratory for Special Functional Materials of the Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng 475004, P. R. China