https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0383-4
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0385-2
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0380-7
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0379-0
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0381-6
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0382-5