Animals, Cardiomyopathy, Dilated, Cells, Cultured, Cricetinae, Female, Fibrosis, Heart Ventricles, Injections, Male, Mesocricetus, Muscle, Skeletal, Myoblasts, Myocardium, Random Allocation, Sarcoglycans, Single-Blind Method, Transplantation, Heterotopic, Ventricular Function, Left