Limb-girdle muscular dystrophies (LGMD) are a series of rare progressive genetic disorders that are characterized by wasting and weakness of the voluntary proximal muscles. The onset of the disease is usually at young age, and most patients will be wheelchair-bound due to the progressive deterioration. Since currently genetic therapies for this disease are still immature, better natural history and genotype-phenotype studies are needed for preparing future therapies.
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Changes in NSAA score
Timeframe: Baseline, Year 1, Year 3, Year 5