Slides were deparaffinized in xylene/ethanol, stained with Sirius Red/Fast Green dye (Chondrex Inc., Redmond, WA, USA) and visualized on an Olympus BX-51 inverted microscope with bright-field and plane-polarized light. Staining intensities of multiple 10× fields of identical size were analyzed from multiple slides from each sample, and staining normalized to tissue area i.e. total number of fields analyzed, quantified with ImageJ software, and averaged for each patient.
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