McNicholas, W., Calverley, P., Lee, A., & Edwards, J. (2004). Long-acting inhaled anticholinergic therapy improves sleeping oxygen saturation in COPD.

McNicholas, W., P. Calverley, A. Lee, and J. Edwards. Long-acting Inhaled Anticholinergic Therapy Improves Sleeping Oxygen Saturation in COPD. 2004.

McNicholas, W., et al. Long-acting Inhaled Anticholinergic Therapy Improves Sleeping Oxygen Saturation in COPD. 2004.