1. Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan
2. Department of Nephrology and Division of Clinical Toxicology, Chang Gung Memorial Hospital, Linkou Medical Center, Chang Gung University and School of Medicine, Taoyuan 333, Taiwan
3. Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan