Samba, C, B Gourmel, P Houze, and D Malvy. 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):484-93. https://doi.org/10.3329/jhpn.v28i5.6157.