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Fibrous capsule micrographs demonstrating different morphology structures ((a)—dense capsule around CFR-PEEK, (b)—two-layered capsule around Ag/PtIr/CFR-PEEK, (c)—microvessel-enriched capsule around Au/CFR-PEEK, (d)—capsule of maximum thickness within a studied series around Au/Pt/CFR-PEEK).
