1. Department of Linguistics, University of Washington , Seattle , United States
2. Department of Electrical and Computer Engineering, University of California Los Angeles , Los Angeles , United States
3. Department of Communication Sciences and Disorders, University of Alberta , Edmonton , Canada
4. Institute of Linguistics, Shanghai International Studies University , Shanghai , China
5. China Braille and Sign Language Research and Application Center, Nanjing Normal University of Special Education , Nanjing , China