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Journal Article Immunology and Aging:Philip Levine Award Get access Roy L. Walford Roy L. Walford Search for other works by this author on: Oxford Academic Google Scholar American Journal of Clinical Pathology, Volume 74, Issue 3, 1 September 1980, Pages 247–253, https://doi.org/10.1093/ajcp/74.3.247 Published: 01 September 1980 Article history Received: 02 April 1980 Accepted: 02 April 1980 Published: 01 September 1980
Roy L. Walford (Mon,) studied this question.