1. Department of Bioengineering & Institute of Engineering in Medicine, University of California, San Diego, La Jolla, California 92093, United States
2. Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, California 90089, United States
3. Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093 United States
4. Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai 90110, Songkhla, Thailand
5. Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai 90110, Songkhla, Thailand
6. Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, P.R. China
7. Department of Statistics, University of California, Los Angeles, California 90095, United States