RT Journal Article SR Electronic T1 Effect of Venesection on Arterial Gas Values and Ventilatory Function in Patients with Chronic Bronchitis JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 441 OP 446 DO 10.1136/thx.20.5.441 VO 20 IS 5 A1 Massaro, Donald A1 Katz, Sol YR 1965 UL http://thorax.bmj.com/content/20/5/441.abstract AB