https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0203-2
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0209-9
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0208-x
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0206-z
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0204-1
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0202-3
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0207-y
https://bmcpalliatcare.biomedcentral.com/articles/10.1186/s12904-017-0205-0