https://bacandrology.biomedcentral.com/articles/10.1186/s12610-019-0095-5
https://bacandrology.biomedcentral.com/articles/10.1186/s12610-019-0098-2
https://bacandrology.biomedcentral.com/articles/10.1186/s12610-019-0096-4
https://bacandrology.biomedcentral.com/articles/10.1186/s12610-019-0097-3