| http://www.w3.org/ns/prov#value | - The full text article was obtained for all potentially eligible studies for further appraisal.Data AbstractionUsing a data abstraction form, two assessors (SMON, RAG) individually selected data on study design, year of study, mode of delivery, stillbirth, miscarriage and potential confounding variables including smoking, maternal age, history of miscarriage or stillbirth and BMI. Discrepancies in
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