Symptoms of DMD usually start in the lower limbs before 6 years of age and progress rapidly, leaving most patients confined to a wheelchair by age 12 years.
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释义
病人常常在6岁之前首先从下肢出现DMD症状,随后进展迅速,绝大多数患者在12岁之前就必须依靠轮椅生活。
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