Abstract One of the major health problems in most of the countries is vitamin A deficiency, which causes serious complications in children. Worldwide, nearly 2.8 million children aged 4–6 years old are affected by clinical […]
Abstract Background There are one-third of children in the world with Vitamin A deficiency. The prevalence of vitamin deficiency in children aged 15–23 months in Iran has increased 18 times and in rural areas. The […]
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