Symptoms usually appear in male children before age 6. Progressive muscle weakness of the legs and pelvis eventually spreads to the arms, neck, and respiratory muscles.
英
美
释义
症状通常出现在男性儿童6岁以前。渐进性肌肉无力的双腿和骨盆扩散到最终的武器,颈部和呼吸肌。
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