The Cochrane Database of Systematic Reviews Gallos, I D, Williams, H M, Price, M J, Merriel, A, Gee, H, Lissauer, D, Moorthy, V, Tobias, A, Deeks, J J, Widmer, M, Tunçalp, Ö, Gülmezoglu, A M, Hofmeyr, G J & Coomarasamy, A 2018, ' Uterotonic agents for preventing postpartum haemorrhage : A network meta-analysis ', Cochrane Database of Systematic Reviews, vol. 0, no. 4, CD011689 . https://doi.org/10.1002/14651858.CD011689.pub2 The Cochrane Library