https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-015-0034-1
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-015-0033-2
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-015-0028-z