https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-62 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-64 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-66 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-68 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-63 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-65 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-67 https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-13-69