For example, in the study of β-blockers by Kelley et al. [26], some patients were concurrently treated with ACE inhibitors and/or ARBs, diuretics, anti-arrhythmics, and inotropes, and many were receiving glucocorticoids, which also are associated with cardiac disease in DMD (as discussed below). This evidence concerns the gene ACE and Duchenne muscular dystrophy.