@article{Calvert2013,
author = {Calvert, C. and Ronsmans, C.},
title= {The contribution of HIV to pregnancy-related mortality: A systematic review and meta-analysis},
year = {2013},
doi = {10.1097/QAD.0b013e32835fd940},
volume = {27},
number = {10},
pages = {1631--1639},
}