RT Journal Article SR Electronic T1 Nocturnal melatonin plasma levels in patients with obstructive sleep apnoea syndrome: the effect of continuous positive airway pressure JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00051906 A1 C. Hernández A1 J. Abreu A1 P. Abreu A1 A. Castro A1 A. Jiménez YR 2007 UL http://erj.ersjournals.com/content/early/2007/05/30/09031936.00051906.abstract AB