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A controlled study of the effect of treatment on chronic bronchitis. An evaluation using pulmonary function tests
Petersen ES, Esmann V, Honcke P, Munkner C
Acta Medica Scandinavica 1967 Jan-Dec;182(3):293-305
clinical trial
4/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; 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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