https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0040-1
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0053-9
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0043-y
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0038-8
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0051-y