1. Faculty of Rehabilitation, Kawasaki University of Medical Welfare, Okayama, Japan
2. Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
3. Saitama Municipal Nakamoto Elementary School, Saitama, Japan
4. Fussa Dai-nana Elementary School, Tokyo, Japan
5. Japan Stuttering Genyukai Association, Tokyo, Japan
6. Narumi Stuttering Consultation Room, Aichi, Japan
7. Faculty of Human Sciences, University of Tsukuba, Ibaraki, Japan