1. Qinghai University; Department of Basic Medical Sciences, Medical College; Xining Qinghai 810016 China
2. National University of Singapore; Department of Biomedical Engineering; 4, Engineering Drive 3, Block E4, #04-10 Singapore 117583 Singapore
3. National University of Singapore; Biomedical Institute for Global Health Research and Technology; MD6, 14 Medical Drive, #14-01 Singapore 117599 Singapore
4. National University of Singapore; NUS Tissue Engineering Program; 27 Medical Drive, DSO (Kent Ridge) Building, #04-01 Singapore 117510 Singapore
5. National University of Singapore, Centre for Life Sciences; Singapore Institute for Neurotechnology; 28 medical Drive Singapore 117456 Singapore