**Chapter 4**

*Geriatric Medicine and Gerontology*

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[69] Cathcart R, Schwiers E, Ames BN. Detection of picomole levels of hydroperoxides using a fluorescent dichlorofluorescein assay. Analytical Biochemistry. 1983;**134**:111-116. DOI: 10.1016/0003-2697(83)90270-1

[70] Sharma MK, Buettner GR. Interaction of vitamin C and vitamin E during free radical stress in plasma: An ESR study. Free Radical Biology & Medicine. 1993;**14**:649-653. DOI: 10.1016/0891-5849(93)90146-L

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