RT Journal Article SR Electronic T1 Circulating endothelin-1 and obstructive sleep apnoea JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 794 OP 795 DO 10.1183/09031936.00.16479400 VO 16 IS 4 A1 S Saarelainen A1 J Hasan YR 2000 UL http://erj.ersjournals.com/content/16/4/794.abstract AB