| Literature DB >> 14160227 |
Abstract
Entities:
Keywords: ANALGESICS AND ANTIPYRETICS; ANESTHESIA, OBSTETRICAL; CLINICAL RESEARCH; LABOR; MEPERIDINE; OXYMORPHONE; PREGNANCY; STATISTICS
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Year: 1964 PMID: 14160227 PMCID: PMC1816313 DOI: 10.1136/bmj.2.5405.353
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447