Genetic: You are born with it. It is most common genetic defect inherited in caucasians. However not all the persons carrying the gene show symptoms.
Answered 4/12/2014
5.3k views
Can also be acquired: While often genetic, there are acquired secondary forms due to iron overload such as some forms of anemia and thalasemmia.
Answered 12/10/2015
5.3k views
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