https://bmcmedinformdecismak.biomedcentral.com/articles/10.1186/1472-6947-11-54
https://bmcmedinformdecismak.biomedcentral.com/articles/10.1186/1472-6947-11-53
https://bmcmedinformdecismak.biomedcentral.com/articles/10.1186/1472-6947-11-52