University College London Sep 11 2025 Children with a rare, debilitating muscle disease could benefit from the findings of new research by experts at UCL and Great Ormond Street Hospital (GOSH). For the study, published in Annals Rheumatic Diseases , the scientists closely analysed muscle samples from three children with juvenile dermatomyositis (JDM) and discovered the mitochondria, small energy-producing structures inside cells, were not functioning correctly.  It's hoped this research will