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. 2022 Oct 9;23(19):11998. doi: 10.3390/ijms231911998

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Lipid composition of SF from the knee joints of human healthy volunteers and OA or RA patients. The molar percentage of phospholipid classes in the total PL extract (A), acyl chain distribution in the total PL extract (B), and molar percentage of saturated, monounsaturated, and polyunsaturated acyls present in the total PL extract (C). Lipids were quantified as described in Materials and Methods. Data are presented as mean ± SD of 7 healthy, 3 OA, and 3 RA humans. p-values (t-test) less than 0.05 were considered significant (*).