Spinal muscular atrophy (SMA) type 1 is the most common and most severe form of SMA. Symptoms typically begin in the first 6 months of life. Life expectancy is less than 2 years without treatment, but ...
Spinal muscular atrophy (SMA) type 1 is a genetic condition in which the nerves that control movement, breathing, and swallowing become progressively weaker and smaller. SMA has five types with ...
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