https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-26 https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-27 https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-24 https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-30 https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-28 https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-25 https://trialsjournal.biomedcentral.com/articles/10.1186/1745-6215-9-29