RT Journal Article SR Electronic T1 Nasopharyngoscopic evaluation of oral appliance therapy for obstructive sleep apnoea JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00077409 A1 A.S.L. Chan A1 R.W.W. Lee A1 V.K. Srinivasan A1 M.A. Darendeliler A1 R.R. Grunstein A1 P.A. Cistulli YR 2009 UL http://erj.ersjournals.com/content/early/2009/09/24/09031936.00077409.abstract AB