Funding for this research was provided by:
World Universities Network (n/a)
Received: 19 February 2020
Accepted: 14 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: none required as this paper only reports on published literature.
: None required.
: Clare Gardiner and Michael Connolly are Associate Editors of BMC Palliative Care, but had no involvement in the handling of this manuscript. All other authors declare that they have no competing interests.