Still uncertain: It appears genetically linked, but not all patients have the same abnormality. The cause is still under investigation: http://en.wikipedia.org/wiki/Amyotrophic_lateral_sclerosis
Answered 7/24/2014
3.9k views
Possible: About 10% of cases of ALS are familial, and 30% of these are due to mutations of the gene than encodes copper/zinc superoxide dysmutase.
Answered 8/16/2014
3.8k views
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