[1] Univ Wollongong, Fac Sci Med & Hlth, Wollongong, NSW, Australia
[2] Univ Technol Sydney, Fac Hlth, IMPACCT, Sydney, NSW, Australia
[3] Flinders Univ S Australia, Res Ctr Palliat Care Death & Dying RePaDD, Adelaide, SA, Australia
[4] Sorbonne Univ, Neurophysiol Resp Expt & Clin UMRS1158, Paris, France
[5] Univ Hull, Wolfson Palliat Care Res Ctr, Kingston Upon Hull, N Humberside, England
[6] Lund Univ, Resp Med Allergol & Palliat Med, Lund, Sweden