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Toluidine-blue, Acid Fucsin, Fast Green stained sections of patellar tendon: 2a) Untrained group: patellar tendon with partially disorganized collagen bundles; 2b) Trained group: patellar tendon with collagen fibers in parallel arrays, closely packed together; 2c) Detrained group: patellar tendon with partially disorganized collagen bundles. Ti: tibia; T: patellar tendon; E: enthesis. Magnification 20×.
