Samba, C., Gourmel, B., Houze, P. and Malvy, D. (2010) “Assessment of Vitamin A Status of Preschool Children in a Sub-Saharan African Setting: Comparative Advantage of Modified Relative-dose Response Test”, Journal of Health, Population and Nutrition, 28(5), pp. 484–493. doi: 10.3329/jhpn.v28i5.6157.