[1] Umea Univ, Dept Nursing, SE-90187 Umea, Sweden
[2] Umea Univ, Dept Community Med & Rehabil, Umea, Sweden
[3] Umea Univ, Dept Publ Hlth & Clin Med, Epidemiol & Global Hlth, Umea, Sweden
[4] La Trobe Univ, Sch Nursing & Midwifery, Victoria, Australia