https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-84 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-86 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-81 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-85 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-82 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-88 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-83 https://ro-journal.biomedcentral.com/articles/10.1186/1748-717X-6-87