It is not transmitte: It is not typically a heriditary or infectious disease. No one knows the exact cause.
Answered 4/9/2014
6.1k views
Rarely genetic: 90% of cases are sporadic, without clearcut genetics, and this is not known to be infectious. Of the 10% familial cases, 25% of these have a mutation in the gene encoding copper/zinc superoxide dismutase.
Answered 3/14/2019
5.5k views
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