https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0347-8
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0342-0
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0346-9
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0345-x
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0349-6
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0350-0
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0343-z