RT Journal Article SR Electronic T1 Supplemental oxygen for COPD patients with nocturnal desaturations? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 997 OP 999 DO 10.1183/09031936.99.14599799 VO 14 IS 5 A1 H Folgering YR 1999 UL http://erj.ersjournals.com/content/14/5/997.abstract AB