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. 2021 Dec 6;49(12):03000605211060675. doi: 10.1177/03000605211060675

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© The Author(s) 2021

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 4. — Forest plots showing subgroup analyses of the effects of vitamin D supplementation on thyroid peroxidase antibody titre in patients with Hashimoto’s thyroiditis: (a) subgroup analysis based on treatment duration; (b) subgroup analysis based on the form of vitamin D administration.^7–14