| http://www.w3.org/ns/prov#value | - Some of these conditions, such as xerophthalmia, night-blindness, stomatitis, catarrhs of all sorts, and certain skin affections are definitely known to occur also in man from this cause; and, for my own part, I do not doubt but that the future will reveal a number of others that are due also to this cause in man: disease of the respiratory and gastro-intestinal tracts in particular.
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