Race and Myositis

I just read an article that state African American males are four times more likely to have myositis as compared to white males and African American females are three times more likely to have myositis as compared to white females. I hope someone does some more research within this population. Maybe there is some in our muscular genetic makeup that could provide a clue to others? Just a thought.

http://www.myositis.org/pdf/Research/AdultInflammatoryMyopathyReview.pdf
This is the article link

I attend a myositis study group in N. O. there were about equal amounts of sexes, and race? does any one know a treatment for the vasculitous? you get in your fingers and cracking of the skin?