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. 2020 Jul 22;12:223. doi: 10.3389/fnagi.2020.00223

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Copyright © 2020 Iqbal, Braidy and Ahmed.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Bar graph showing the total and fractional cholesterol in serum samples of age-matched healthy control, mild CI, moderate CI and severe cognitively impaired subjects. (A) Low-density lipoprotein (LDL) cholesterol in serum samples. (B) High-density lipoprotein (HDL) cholesterol level in serum samples. (C) Triglycerides level in serum samples. (D) Total cholesterol concentration in serum samples. (E) Cholesterol ratio in serum samples. **p < 0.01, ***p < 0.001 compared with age-matched healthy control group; ^#p < 0.05, ^##p < 0.01, ^###p < 0.001 comparison with mild cognitive impaired group; n, samples size.