BMC Pregnancy and Childbirth, Volume 21, Year 2021
Tropical Medicine and International Health, Volume 18, No. 10, Year 2013
PLoS ONE, Volume 9, No. 2, Year 2014
Health Policy and Planning, Volume 31, No. 5, Year 2016
Reproductive Health, Volume 17, No. 1, Year 2020
Bulletin of the World Health Organization, Volume 98, No. 6, Year 2020
The Lancet, Volume 380, No. 9848, Year 2012
Global Health Action, Volume 8, No. 1, Year 2015