1. Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 30013, Taiwan
2. Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
3. Department of Orthopaedic Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
4. Department of Orthopaedic Surgery, Paochien Hospital, Pingtung 90064, Taiwan