Demissie, Tsegaye, Ahmed Ali, Yared Mekonnen, Jemal Haider, and Melaku Umeta. 2009. “Demographic and Health-Related Risk Factors of Subclinical Vitamin A Deficiency in Ethiopia”. Journal of Health, Population and Nutrition 27 (5):666-73. https://doi.org/10.3329/jhpn.v27i5.3778.