https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-015-0003-8
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/1472-6823-15-3
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-015-0001-x
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-015-0004-7