Reference:
Centrum Silver 50+ MIMS Thailand [Online: http://www.mimsonline.com/Thailand/drug/info/Centrum%20Silver%2050%2b/?type=full#Warnings] cited on August 29, 2013.
Cod liver oil [Online: http://www.webmd.com/vitamins-supplements/ingredientmono-1040-COD%20LIVER%20OIL.aspx?activeIngredientId=1040&activeIngredientName=COD%20LIVER%20OIL] cited on August 29, 2013.
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