1. Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
2. Paul C. Lauterbur Research Center for Biomedical Imaging Shenzhen Key Laboratory of Ultrasound Imaging and Therapy CAS Key Laboratory of Health Informatics Institute of Biomedicals and Health Engineering Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 P. R. China
3. Singapore Institute of Neurotechnology National University of Singapore Singapore 117456 Singapore
4. Department of Neurosurgery National Neuroscience Institute Singapore 308433 Singapore
5. Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 China