Maternal and Child Health Journal, Volume 19, No. 8, Year 2015
PLoS ONE, Volume 9, No. 8, Year 2014
Reproductive Health, Volume 8, No. 1, Year 2011
Maternal and Child Health Journal, Volume 15, No. 7, Year 2011
Bulletin of the World Health Organization, Volume 87, No. 1, Year 2009