https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0129-3 https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0130-x https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0134-6 https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0135-5 https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0133-7 https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0136-4 https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-016-0131-9