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Opium use during pregnancy and risk of preterm delivery: A population-based cohort study
Maghsoudlou S,
Cnattingius S,
Montgomery S,
Aarabi M,
Semnani S,
et al.
(2017)
Opium use during pregnancy and risk of preterm delivery: A population-based cohort study.
PLOS ONE 12(4): e0176588.
https://doi.org/10.1371/journal.pone.0176588