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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Wright H. P., Frosst J. B., Puchel F., Lawrence M. R. VITAMIN "A" AND THE COMMON COLD. Can Med Assoc J. 1931 Oct;25(4):412–416. [PMC free article] [PubMed] [Google Scholar]