World Health Organization. Serum retinol concentrations for determining the prevalence of vitamin A deficiency in populations. Vitamin and Mineral Nutrition Information System. World Health Organization, 2011. Accessed Feb 2020.
![ARUP logo](/themes/arup/images/LogoPrint.png)
Browse A-Z
World Health Organization. Serum retinol concentrations for determining the prevalence of vitamin A deficiency in populations. Vitamin and Mineral Nutrition Information System. World Health Organization, 2011. Accessed Feb 2020.