I had not heard of "nonimmune hypothyroidism" previously, but I just looked it up – I think the important thing about these papers is that none of them mentions reverse T3, without which intracellular hypothyroidism cannot be diagnosed.
I suspect that the "nonimmune hypothyroidism" which they mention is actually intracellular hypothyroidism: please see my website, "CBHRT.ca", for information regarding intracellular hypothyroidism, or go directly to the Paige, at https://cbhrt.ca/intracellular-hypothyroidism/.
Before reading that page. However, please view a blog, with a much abbreviated explanation, entitled "stress causes hypothyroidism", at https://cbhrt.ca/blog/
I hope this information will answer your question.