[1] Karolinska Inst, Dept Clin Sci & Educ, Unit Anaesthesiol & Intens Care, Sodersjukhuset, Sjukhusbacken 10, S-11883 Stockholm, Sweden
[2] Univ Gavle, Fac Hlth & Occupat Studies, Kungsbacksvagen 47, S-80176 Gavle, Sweden
[3] Linnaeus Univ, Ctr Collaborat Palliat Care, Dept Hlth & Caring Sci, Univ Platsen 1, S-35252 Vaxjo, Vaxjo, Sweden