https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-34 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-38 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-37 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-36 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-33 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-35 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-30 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-32 https://jhoonline.biomedcentral.com/articles/10.1186/1756-8722-7-31