DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Smith GC, Fleming KM, White IR.
Birth order of twins and risk of perinatal death related to delivery in England, Northern Ireland, and Wales, 1994-2003: retrospective cohort study.
BMJ 2007;
334 (7593): 576 . Doi: 10.1136/bmj.39118.483819.55
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