[1] Uppsala Univ, Dept Surg Sci Otorhinolaryngol Head & Neck Surg, Uppsala, Sweden
[2] Gothenburg Univ, Sahlgrenska Univ Hosp, Ctr Sleep & Wake Disorders, Sahlgrenska Acad,Sleep Disorders Ctr,Pulm Dept, Gothenburg, Sweden
[3] Uppsala Univ, Dept Med Sci Resp Allergy & Sleep Res, Uppsala, Sweden
[4] Lund Univ, Fac Med, Dept Clin Sci Lund Resp Med & Allergol, Lund, Sweden
[5] Uppsala Univ, Dept Med Sci Resp Allergy & Sleep Res, Ctr Res & Dev, Reg Gavleborg, Uppsala, Sweden