Demissie, T., Ali, A., Mekonnen, Y., Haider, J., & Umeta, M. (2009). Demographic and Health-related Risk Factors of Subclinical Vitamin A Deficiency in Ethiopia. Journal of Health, Population and Nutrition, 27(5), 666–673. https://doi.org/10.3329/jhpn.v27i5.3778