Double-blind studies

letter

. 1972 Feb 19;106(4):307.

PMCID: PMC1940396 PMID: 20311870

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

Hoffer A. Vitamin C and the common cold. Can Med Assoc J. 1971 Nov;105(9):901–902. [PMC free article] [PubMed] [Google Scholar]