Anxiety and Written Output Disorder

I am presently trying to find resources to link to about any connection between written output disorder and anxiety. If you come across anything pertinent please email it to me for uploading.
I am curious to learn how significant a role anxiety plays in either creating written output disorder (if one believes such a thing could be created per se, not so sure I buy it myself) or perpetuating it.

My eyes and ears are peeled and open for info.

I'd also love to here from parents of children with written output disorder or writing problems as to whether they've noticed a higher level of anxiety in their children generally.