1. Synteraction lab, Department of Computer Science, National University of Singapore, Singapore
2. University of Illinois Urbana-Champaign, United States
3. Synteraction lab, National University of Singapore, Singapore
4. School of Creative Media, City University of Hong Kong, China
5. School of Information Sciences, University of Illinois at Urbana-Champaign, United States
6. Computer Science, National University of Singapore, Singapore