1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China
2. National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen 518055, P. R. China
3. Med-X Research Institute & School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, P. R. China
4. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Science Drive 4, 117585 Singapore
5. Department of Physiology, School of Basic Medical Sciences, Shenzhen University, Shenzhen 518055, P. R. China
6. Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, P. R. China
7. School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore