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DMD is the most severe form of muscular dystrophy, affecting about 1 in 3500 males. Progressive muscular weakness and cardiac damage ultimately result in premature death. Studies demonstrated a benefit from infusions of cardiac progenitor “cardiosphere” derived cells (CDCs) from donated hearts into coronary arteries in various cardiomyopathies, including post–myocardial infarction status and dilated cardiomyopathy. In mice with the mdx model of DMD, the infusions improved cardiac muscle function, increased exercise capacity, prolonged survival, and enhanced skeletal muscle function. In a manufacturer-sponsored trial, investigators evaluated the effects of CDC infusions (75 million cells total) into the coronary arteries of 13 males with DMD…