RT Journal Article SR Electronic T1 Effect of aminophylline on brain tissue oxygenation in patients with chronic obstructive lung disease. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 582 OP 582 DO 10.1136/thx.48.5.582 VO 48 IS 5 A1 G J Addis YR 1993 UL http://thorax.bmj.com/content/48/5/582.1.abstract AB