More about Autism and Mercury

There's a continuing discussion at Respectful Insolence of the link -- or, more accurately, the lack of an established link -- between mercury in vaccines and autism, and about a post on the Special Education Law Blog.  In the comments in particular, there's a useful discussion of what should count as a link between a condition and a suspected cause.

As an aside, query whether your favorite journal's disclosure policy would require paid expert witnesses to disclose their expert work when publishing relevant research.  Some policies are not so clear as you might hope.