[1] Karolinska Inst, CLINTEC Speech & Language Pathol, Stockholm, Sweden
[2] Karolinska Univ Hosp, Funct Area Speech & Language Pathol, Stockholm, Sweden
[3] Skane Univ Hosp, Dept Otorhinolaryngol, Div Speech & Language Pathol, Malmo, Sweden
[4] Lund Univ, Dept Clin Sci, Malmo, Sweden
[5] Royal Inst Technol, Dept Med Engn & Hlth Syst Stockholm, Stockholm, Sweden