[1] Univ South Eastern Norway, Fac Hlth & Social Sci, Dept Nursing & Hlth Sci, Porsgrunn, Norway
[2] Orebro Univ, Fac Med & Hlth, Sch Hlth Sci, Orebro, Sweden
[3] Univ Oslo, Inst Hlth & Soc, Med Fac, Dept Publ Hlth Sci, Oslo, Norway
[4] Umea Univ, Fac Med, Dept Nursing, Umea, Sweden
[5] VIA Univ Coll, Sch Hlth Sci Nursing, Aarhus, Denmark
[6] Univ Stavanger, Fac Hlth Sci, Dept Qual & Hlth Technol, Stavanger, Norway