Accelerated Approval, Biotechnology, Cardiac Biomarkers, Cardiac Gene Therapy, Clinical Development, Danon Disease, Fda-aligned Trial, Gene Therapy, Gene Therapy Clinical Trial, Healthcare Technology, Lamp2 Protein, Left Ventricular Mass Index, Pharmaceuticals, Phase 2 Trial, Rare Disease Therapy, Rocket, Rp-a501, Rp-a501 Clinical Trial