1. Department of Electronic Engineering, Chang Gung University, Tao-Yuan, Taiwan
2. Department of Dermatology, Chang Gung Memorial Hospital, Linkou Branches, Tao-Yuan, Taiwan
3. Centre for Reliability Sciences and Technologies, Chang Gung University, Tao-Yuan, Taiwan
4. Deptartment of Engineering and System Science, National Tsing Hua University, Hsin-Chu, Taiwan