[1] Univ Turku, Dept Nursing Sci, FIN-20014 Turku, Finland
[2] Turku Univ Hosp, Turku, Finland
[3] Martin Luther Univ Halle Wittenberg, Inst Hlth & Nursing Sci, Halle, Germany
[4] Univ Int Catalunya Barcelona, Fac Med & Hlth Sci, Barcelona, Spain
[5] Dublin City Univ, Sch Nursing Psychotherapy & Community Hlth, Dublin, Ireland
[6] Vilnius Univ, Inst Hlth Sci, Vilnius, Lithuania
[7] Univ Iceland, Fac Nursing, Reykjavik, Iceland
[8] Univ Turku, Fac Med, Unit Biostat, Turku, Finland