@article{Frass2015,
author = {Frass, K.A.},
title= {Postpartum hemorrhage is related to the hemoglobin levels at labor: Observational study},
year = {2015},
doi = {10.1016/j.ajme.2014.12.002},
volume = {51},
number = {4},
pages = {333--337},
}