Oxytocin during labour and risk of severe postpartum haemorrhage: a population-based, cohort-nested case-control study - Belghiti, J; Kayem, G; Dupont, C; Rudigoz, R C; Bouvier-Colle, M H; Deneux-Tharaux, C (BMJ Open, 2011)
. Doi: 10.1136/bmjopen-2011-000514