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https://www.healthychildren.org/English/ages-stages/baby/feeding-nutrition/Pages/Vitamin-Iron-Supplements.aspx
[Accessed July 2021]
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https://www.healthychildren.org/English/healthy-living/nutrition/Pages/Vitamin-D-On-the-Double.aspx
[Accessed July 2021]
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https://www.livescience.com/18802-dickens-tiny-tim-diagnosis.html
[Accessed July 2021]
