5Celli B R. Current thoughts regarding treatment of chronic obstructive pulmonary disease[J]. Med Clin North Am, 1996,80(3) : 589-600.
6British Medical Research Council Working Party. Long term domiciliary oxygen therapy in chronic hypoxic corpulmonale complicating chronic bronchitis and emphysema[J]. Lancet,1981,1681-1685.
7Nocturnal Oxygen Therapy Trial Group. Continuous or nocturnal oxygen therapy in hypoxemic chronic obstructive lung disease: a clinical trial[J]. Ann Intern Med, 1980,93(7) : 391-398.
