https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-019-0424-x
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-019-0422-z
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-019-0420-1
https://bmcendocrdisord.biomedcentral.com/articles/10.1186/s12902-019-0423-y