Everyone in doubt about whether or not the BTA get their facts right should read the rebuttal by Dr Lowe via www.stopthethyroidmadness.com/blog
It is a great letter, it shows the errors in their decision for guidelines (in addition to the fact we as patients were not consulted as they stated we were). I BET they won't dare answer him.
I advise people to read it on that blog, it is truly informative how many studies have in fact been done.

lotsa luv
Dawnx