[1] Univ Orebro, Swedish Inst Disabil Res, Sch Hlth & Med Sci, Audiol Res Ctr,Orebro Univ Hosp, SE-70182 Orebro, Sweden
[2] Linkoping Univ, HEAD Grad Sch, Linkoping, Sweden
[3] Vrije Univ Amsterdam Med Ctr, Inst Hlth & Care Res, Audiol Sect, Dept Otolaryngol Head & Neck Surg,EMGO, Amsterdam, Netherlands
[4] Univ Pretoria, Dept Speech Language Pathol & Audiol, ZA-0002 Pretoria, South Africa
[5] Univ Western Australia, Sch Surg, Ear Sci Ctr, Nedlands, WA 6009, Australia
[6] Ear Sci Inst Australia, Subiaco, WA, Australia