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Five differentially expressed genes, HLA-DQA1, smooth muscle myosin heavy chain (SMMHC), clusterin, plexin D1, and tenomodulin were verified by quantitative RT-PCR, and their level of expression compared in diagnostic muscle biopsies from 5 girls with untreated symptoms of JDM for a short disease duration < 2 months (open bars) and 5 girls with untreated symptoms of JDM of ≥ 2 months duration (black bars). * p < 0.05, **p < 0.005.
