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Comparison of three oxygen delivery systems during exercise in hypoxemic patients with chronic obstructive pulmonary disease
Hagarty EM, Skorodin MS, Langbein WE, Hultman CI, Jessen JA, Maki KC
American Journal of Respiratory and Critical Care Medicine 1997 Mar;155(3):893-898
clinical trial
3/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

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