I'd approach it obliquely.
Persuade the lab to append to each result "This test is almost always
completely useless in management", and ideally "as it is in this
case".
Let the GPs and their staff reading that and reading that out to
patients cause the information to spread into the oral tradition
locally.
Put up on your blog or web page and that of the trust a statement on
its own on a short page with suitable links to other investigations
and to diagnoses, a similar statement, with a single link to your
longer argument, that having links to the papers etc.
Then wait.
If that is difficult to do, or widely regarded as incorrect, then
taking forceful action to stop it is less likely to be correct.
Some GPs are, presumably, MRCP and Rheumatology GPSIs. It is a
mistake to argue that a current occupational category or post
precludes the possession of knowledge of a particular sort.
--
Adrian Midgley http://www.defoam.net/
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