Postpartum haemorrhage management, risks, and maternal outcomes: findings from the World Health Organization Multicountry Survey on Maternal and Newborn Health - Sheldon, W. R; Blum, J; Vogel, J. P; Souza, João Paulo Dias de; Gülmezoglu, A. M; Winikoff, B (BJOG - An International Journal of Obstetrics and Gynaecology, 2014)