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; doi: (Published 02 March 2007) Cite this as: BMJ 2007;:bmj;bmj.39118.483819.55v1

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview