Comparison of three oxygen delivery systems during exercise in hypoxemic patients with chronic obstructive pulmonary disease.
Am J Respir Crit Care Med. 1997 Mar;155(3):893-8. doi: 10.1164/ajrccm.155.3.9117023.
Am J Respir Crit Care Med. 1997.
PMID: 9117023
Clinical Trial.