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Temporal trends in perinatal drug use among parturients at an inner-city hospital were assessed in a cohort study of 1300 parturients in 1991 through 1992 and 1111 parturients in 1988 through 1989. Toxicology results were coupled to data sheets containing demographic and obstetrical information. A decrease was noted between 1988 and 1992 in the prevalence(More)
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