Assertion: avitaminosis | /r/HasProperty | natvig
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Source sentences:
text: Great progress in the understanding of its etiology was made by Axel Holst (1860–1931) and Theodor Frølich (1870–1947) who, based on a series of experiments, concluded in 1907 that scurvy was an avitaminosis (Natvig, 1964, Norum and Grav, 2002).