Beth,

Thanks for your inquiry!

It is hereditary in most respects, the studies show that there is a 50 – 50 chance that is is passed down generation to generation.  Two of the three siblings in my family have been diagnosed.  They do not have a genetic test at this point.

I do think it is a bit unusual to have two siblings being diagnosed.  I am now finding more and more people with this through word of mouth.

Warren