Wei-Hong Zhang, Catherine Deneux-Tharaux, Peter Brocklehurst, Edmund Juszczak, Matthew Joslin, Sophie Alexander et al
Zhang W, Deneux-Tharaux C, Brocklehurst P, Juszczak E, Joslin M, Alexander S et al.
Effect of a collector bag for measurement of postpartum blood loss after vaginal delivery: cluster randomised trial in 13 European countries
BMJ 2010; 340 :c293
doi:10.1136/bmj.c293