1. Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
2. Department of Dermatology Yueyang Hospital of Integrated Traditional Chinese and Western Medicine Shanghai University of Traditional Chinese Medicine Shanghai 200437 P. R. China
3. Institute of Dermatology Shanghai Academy of Traditional Chinese Medicine Shanghai 201203 P. R. China