New paper showing, as is well known, relationship between Hashimoto's and Viamin D levels. Downloadable.
Front. Endocrinol., 14 February 2020 | doi.org/10.3389/fendo.2020....
Correlation Between Hashimoto's Thyroiditis–Related Thyroid Hormone Levels and 25-Hydroxyvitamin D
Guanqun Chao*, Yue Zhu and Lizheng Fang*