1. Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan
2. Department of Computer Science and Information Engineering, Graduate Institute of Networking and Multimedia, Graduate Institute of Biomedical Electronics and Bioinformatics, Internet of Things Research Center, and the Graduate Institute of Medical Device and Imaging, National Taiwan University, Taipei, Taiwan
3. Department of Computer Science and the Institute of Communications Engineering, National Tsing Hua University, Hsinchu, Taiwan
4. Faculty of Computer Science, University of New Brunswick, Fredericton, NB, Canada