https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0339-8
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0341-1
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0332-2
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0338-9
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0337-x
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0344-y
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0335-z
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-018-0340-2