Singapore Institute for Clinical Sciences (SICS), Agency for Science Technology and Research (A*STAR), Singapore, 117609, Singapore.|Singapore Institute for Clinical Sciences (SICS), Agency for Science Technology and Research (A*STAR), Singapore, 117609, Singapore.|Singapore Institute for Clinical Sciences (SICS), Agency for Science Technology and Research (A*STAR), Singapore, 117609, Singapore.|School of Computer Science and Engineering, Nanyang Technological University (NTU), Singapore, 639798, Singapore. ASCKKWOH@ntu.edu.sg.