https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0046-8
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0052-x
https://aoemj.biomedcentral.com/articles/10.1186/s40557-015-0055-2
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0044-x
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0048-6