[1] Univ Turku, Dept Nursing Sci, Turku, Finland
[2] Univ Kristianstad, Dept Hlth Sci, Kristianstad, Sweden
[3] Univ Stavanger, Dept Hlth Studies, Fac Social Sci, Stavanger, Norway
[4] Kalmar Cty Council, Linkoping, Sweden
[5] Linkoping Univ, Linkoping, Sweden
[6] Univ Athens, Fac Nursing, Athens, Greece
[7] Univ Turku, Dept Stat, Turku, Finland
[8] Birmingham City Univ, Birmingham, W Midlands, England
[9] Loyola Univ Chicago, Loyola Univ Med Ctr, Niehoff Sch Nursing, Maywood, IL USA
[10] Univ Turku, Hosp Dist S Western Finland, Dept Nursing Sci, Turku, Finland