1. Department of Clinical Science, Intervention and Technology, Division of Speech and Language Pathology, Karolinska Institutet, Stockholm, Sweden
2. Faculty of Arts, Psychology and Theology, Logopedics, Åbo Akademi University, Turku, Finland
3. Department of Clinical Sciences Section IV, Logopedics, Phoniatrics and Audiology, Lund University, Lund, Sweden
4. Department of Neurology, Division of speech and language pathology, Danderyd Hospital, Stockholm, Sweden