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. 2017 Jan 16;7:40543. doi: 10.1038/srep40543

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OPLS-DA plots of six groups (sham at week 14, OA at week 14, and individual treatment from week 8 to week 14): (A) treatment with Drug A, (B) treatment with Drug B, (C) treatment with Drug C and (D) treatment with Drug D. OPLS-DA plots of five groups (sham at week 14 and individual treatment from week 8 to week 14): (E) treatment with Drug A, (F) treatment with Drug B, (G) treatment with Drug C and (H) treatment with Drug D.