Reproductive Health, Volume 15, No. 1, Year 2018
BMC Pregnancy and Childbirth, Volume 16, No. 1, Year 2016
Reproductive Health, Volume 6, No. 1, Year 2009
BMC Public Health, Volume 11, Year 2011
BMC Pregnancy and Childbirth, Volume 14, No. 1, Year 2014
Reproductive Health, Volume 13, No. 1, Year 2016