Wheres the study with 4000 ppl?

Hi,

I am interested in this "iodine project" and the exact results and tests of this big study. (especially if they did take thyroid parameters and ultrasounds of the patients)

When I search it, I only am able to find a document called "The historical background of the Iodine Project" and a website that uses this name.

Could anyone help me out in finding this study or other long-time high-dose studies aswell, especially focusing on thyroid health and general health second?

Older studies are welcome aswell, especially those who are not having an interest in promoting its use like optimox and the documents they've uploaded (not saying they're all bad as they are not, I just prefer research documents without conflict of interest)

I have read alot of them, but I hope that someone will show me some material I havent seen yet