https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0027-y
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0032-1
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0030-3
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0031-2
https://aoemj.biomedcentral.com/articles/10.1186/s40557-014-0029-9