https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0098-6
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0100-3
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0096-8
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0097-7