[1] George Washington Univ, Dept Speech Language & Hearing Sci, Washington, DC 20052 USA
[2] Univ Maryland, Dept Hearing & Speech Sci, College Pk, MD 20742 USA
[3] Montclair State Univ, Dept Commun Sci & Disorders, Bloomfield, NJ USA
[4] Thomas More Univ, Speech Language Pathol & Audiol, Antwerp, Belgium
[5] Univ Turku, Speech Language Pathol, Turku, Finland
[6] City Lit, London, England
[7] Erasmus MC, Dept Otorhinolaryngol Head & Neck Surg, Rotterdam, Netherlands
[8] Univ Melbourne, Dept Audiol & Speech Pathol, Parkville, Vic, Australia
[9] Murdoch Childrens Res Inst, Speech & Language Grp, Parkville, Vic, Australia
[10] Univ Georgia, Dept Commun Sci & Special Educ, Athens, GA 30602 USA
[11] Michael Palin Ctr Stammering Children, London, England
[12] Univ Technol Sydney, Australian Stuttering Res Ctr, Sydney, NSW, Australia
[13] Univ Cent Florida, Dept Commun Sci & Disorders, Orlando, FL 32816 USA
[14] Michigan State Univ, Dept Commun Sci & Disorders, E Lansing, MI 48824 USA