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microscope scientific research medical education publishing foreign objects glass slides cover slips oil glasses objective lenses eyepieces medicine micrography inflammation pathology human pathology libraries micrographs clinical basic tissues cytoplasm nucleus organs metabolic diseases gout uric acid crystals gout stones purine fibroblasts connective tissue blood vessels red cells lymphocytes plasma collagen fibers white neutrophils phagocytes joints synovium cartilage giant chronic granulomatous inflammatory response