@article{article0439a851,
title   = {Global, regional, and national levels and causes of maternal mortality during 1990–2013: a systematic analysis for the Global Burden of Disease Study 2013},
author = {Kassebaum, Nicholas J. and Bertozzi-Villa, Amelia and Coggeshall, Megan S. and Shackelford, Katya A. and Steiner, Caitlyn and Heuton, Kyle R. and Gonzalez-Medina, Diego and Barber, Ryan and Huynh, Chantal and Dicker, Daniel and Templin, Tara and Wolock, Timothy M. and Ozgoren, Ayse Abbasoglu and Abd-Allah, Foad and Abera, Semaw Ferede and Abubakar, Ibrahim and Achoki, Tom and Adelekan, Ademola and Ademi, Zanfina and Adou, Arsène Kouablan and Adsuar, José C. and Agardh, Emilie E. and Lotufo, Paulo A.},
year = {2014},
doi = {10.1016/s0140-6736(14)60696-6},
journal   = {Lancet}
}