[1] Univ Notre Dame Australia, Sch Nursing & Midwifery, POB 1225, Fremantle, WA 6959, Australia
[2] St John God Murdoch Hosp, 100 Murdoch Dr, Murdoch, WA 6150, Australia
[3] Edith Cowan Univ, Sch Nursing & Midwifery, 270 Joondalup Dr, Churchlands, WA 6027, Australia
[4] Murdoch Univ, Sch Hlth Profess, 90 South St, Murdoch, WA 6150, Australia
[5] Sir Charles Gairdner Hosp, WA Canc & Palliat Care Network, A Block,Hosp Ave, Nedlands, WA 6009, Australia
[6] Univ Notre Dame Australia, Inst Hlth Res, POB 1225, Fremantle, WA 6959, Australia
[7] Univ Western Australia, Sch Populat & Global Hlth, 35 Stirling Hwy, Crawley, WA 6009, Australia
[8] UCL, Gower St, London WC1E 6BT, England