1. Innovative Center for Flexible Devices (iFLEX)Max Planck–NTU Joint Lab for Artificial SensesSchool of Materials Science and EngineeringNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
2. School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
3. Trauma & Emergency CenterShanghai General HospitalShanghai Jiaotong University School of Medicine 100 Haining Road Shanghai 200080 P. R. China
4. Institute of Materials Research and EngineeringAgency for Science Technology and Research (A*STAR) 2 Fusionopolis Way Singapore 138634 Singapore