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Portable oxygen in chronic obstructive lung disease with hypoxemia and cor pulmonale. A controlled double-blind crossover study
Lilker ES, Karnick A, Lerner L
Chest 1975 Aug;68(2):236-241
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: Yes; Blind therapists: Yes; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: No; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

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