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Effects of hospital delivery during off-hours on perinatal outcome in several subgroups: a retrospective cohort study

Ronald Gijsen*, Chantal WPM Hukkelhoven, C Maarten A Schipper, Uzor C Ogbu, Mieneke de Bruin-Kooistra and Gert P Westert

BMC Pregnancy and Childbirth 2012, 12:92  doi:10.1186/1471-2393-12-92