1. BioSystems and Micromechanics IRG; Singapore-MIT Alliance for Research and Technology (SMART) Center; 1 CREATE Way, #04-13/14 Enterprise, Wing Singapore 138602 Singapore
2. Cancer Science Institute of Singapore; National University of Singapore; MD6, Medical Drive Singapore 117456 Singapore
3. Institute of Molecular Cell Biology (IMCB), A-STAR, Department of Biochemistry School of Medicine; National University of Singapore, Proteos; 61 Biopolis Drive Singapore 138673 Singapore
4. Department of Biological Engineering and Department of Mechanical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139 USA