Considering most of DMD patients were resulted from large deletion and/or duplications in the DMD gene, the standard or recommended genetic testing for patients with DMD-like symptoms would be quantitative analysis to detect deletions and/or duplications of DMD exons by MLPA or array-cGH, followed by WES or Sanger seuqencing and if necessary, whole genome sequencing (WGS) when MLPA or array-cGH returns negative results [24]. The gene discussed is DMD; the disease is Duchenne muscular dystrophy.