BMC Pediatrics, Volume 11, Year 2011
BMC Pregnancy and Childbirth, Volume 16, No. 1, Year 2016
Journal of Health, Population and Nutrition, Volume 29, No. 5, Year 2011
BMC Medicine, Volume 11, No. 1, Year 2013
Bulletin of the World Health Organization, Volume 92, No. 8, Year 2014
BMC Pregnancy and Childbirth, Volume 12, Year 2012