Shengbing Yang†§, Xiuguo Han†§, Ying Yang†, Han Qiao†, Zhifeng Yu†, Yang Liu‡, Jing Wang‡, and Tingting Tang*†
† Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, P. R. China
‡ Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China