RGX-202 demonstrating consistent evidence of positively changing disease trajectory for Duchenne All dose level 2 participants exceeded external natural history controls on all functional measures Biomarker data demonstrate consistent, robust microdystrophin expression and transduction levels across all treated ages One new participant aged 2 years at dosing had expression level at 118.6% compared to control Favorable safety profile continues with no serious adverse events or adverse events of specia ...