Here are two more good articles from Dr. Tania Smith of the Canadian Thyroid Patients group.
I recommend these articles as excellent briefing information for those who want to know more about the deiodinases and thyroid hormones:
https://thyroidpatients.ca/2019/11/12/visualizing-thyroid-hormone-activity-in-cells/
and
https://thyroidpatients.ca/2019/11/14/deiodinase-type-3-plays-a-t3-blocking-function/
Best wishes,
Paul