1. Shanghai Key Laboratory of Advanced Polymeric Materials; State Key Laboratory of Bioreactor Engineering; Key Laboratory for Ultrafine Materials of Ministry of Education; School of Materials Science and Engineering; East China University of Science and Technology; Shanghai 200237 China
2. Department of Prosthodontics; School of Medicine; Ninth Hospital Affiliated to Shanghai Jiao Tong University; 639 Zhizaoju Road Shanghai 200011 China