@article{20784,
  author = {Kassebaum N and Bertozzi-Villa A and Coggeshall MS and Shackelford KA and Steiner C and Heuton KR and Murray CJ and Lozano R and Jha V. and Rahimi K},
  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.},
  year = {2014},
  journal = {Lancet},
  volume = {pii: S0140-6736(14)60696-6.},
  language = {eng},
}