The Lancet Global Health, Volume 7, No. 8, Year 2019
BMC Pregnancy and Childbirth, Volume 16, No. 1, Year 2016
BMC Pregnancy and Childbirth, Volume 12, Year 2012
Scientific Reports, Volume 6, Year 2016
International Journal of Health Geographics, Volume 13, No. 1, Year 2014
The Lancet Global Health, Volume 3, No. 7, Year 2015
Tropical Medicine and International Health, Volume 16, No. 5, Year 2011
Bulletin of the World Health Organization, Volume 95, No. 12, Year 2017