[1] Karolinska Inst, CLINTEC, Div ENT Dis, Huddinge, Sweden
[2] Kristianstad Univ, Sect Biomed, Kristianstad, Sweden
[3] Univ Hosp Ghent, Upper Airways Res Lab, Ghent, Belgium
[4] Lund Univ, Dept Biol, Lund, Sweden
[5] Charite, ENT Dept, Berlin, Germany