Hi Harry,

You slipped in there while I was writing my post.

Well given that both MS and Crohn's patients are often prescribed immune suppressants, I would not think it was in Biogen's best interests to try to attribute the cases of PML to prior or current use of immunosuppressants. It doesn't make much financial sense given that so many patients HAVE used immunosuppressants (or immune modulators if Biogen wants to assert it was concomitant use of Avonex that caused PML). They'd be better off saying it was just an unknown and extremely rare result than blaming the use of immunosuppressants or modulators.