I don't know if that's true, Annie0710
But I remember I read it somewhere.
And I think I only remember it , is because my OH has had it.
That's why I badger him to cover his chest up with a scarf in the winter.
Because that's stuck in my head...
I'm off to have mine tomorrow at the docs..
Hate going in there, sometimes you come out with worse than what you went in there for...lol