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Abstract
Mesh: See more » BiopsyCosts and Cost AnalysisDigestive System/anatomy & histologyEndoscopyFiber Optic TechnologyHumansRespiratory System/anatomy & histology
Year: 1974 PMID: 4843648 PMCID: PMC1611284
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447