A. . Hussain, S. Rafique, S. . Batool, S. Hina, and M. S. . Mahmood, “A Cross-Sectional Survey of Vitamin A Deficiency and the Associated Risk Factors among the Children of District Gujrat, Punjab, Pakistan”, BioSci Rev., vol. 2, no. 3, pp. 46–59, Sep. 2020.