1. Centre for Reliability Science and Technology, Chang Gung University, Wenhua 1st Road, Guishan Dist., Taoyuan City 33302, Taiwan
2. Department of Electronics Engineering, Chang Gung University, Wenhua 1st Rd., Guishan Dist., Taoyuan City 33302, Taiwan
3. Department of Urology, Chang Gung Memorial Hospital, Guishan, Taoyuan 333, Taiwan
4. Centre for Reliability Engineering, Ming Chi University of Technology, 84 Gungjuan Rd., Tishan Dist., New Taipei City 24301, Taiwan