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Correlations between phenotypes and serum creatinine (SCRN) or creatine kinase (CK) levels. (A) SCRN levels in patients with Duchenne muscular dystrophy (DMD)/intermediate muscular dystrophy (IMD) or Becker muscular dystrophy (BMD). (B) CK levels in patients with DMD/IMD or BMD. The median of SCRN levels at each age is represented by short lines.
