[1] Lovisenberg Diaconal Univ Coll, Oslo, Norway
[2] VID Specialized Univ, Fac Hlth Studies, Oslo, Norway
[3] Ersta Skondal Univ Coll, Stockholm, Sweden
[4] Oslo & Akershus Univ Coll Appl Sci, Dept Nursing & Hlth Promot, Kjeller, Norway
[5] Diakonhjemmet Hosp, Outpatient Clin, Oslo, Norway