RT Journal Article SR Electronic T1 Randomized trial of nasal surgery for fixed nasal obstruction in obstructive sleep apnoea JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00087607 A1 I. Koutsourelakis A1 G. Georgoulopoulos A1 E. Perraki A1 E. Vagiakis A1 C. Roussos A1 S.G. Zakynthinos YR 2007 UL http://erj.ersjournals.com/content/early/2007/09/26/09031936.00087607.abstract AB