Top501 World: Obama Tax Calculator posted at Articles.Top501.nu - More! Videos!     Daily Digest: Capturing, Tagging, and Protecting the Vote Daily Digest: Capturing, Tagging, and Protecting the Vote Published 10 hours ago by Nanc... details >>>

The autosomal recessive versions of SMA are caused by inheritance of a mutated gene from each parent, who would not know that they have the abnormal gene because having only one mutated copy produces no symptoms. The most common form of SMA is cau... details >>>

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