https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-15
https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-12
https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-14
https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-16
https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-13
https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-17