1. School of Social Work, University of Michigan, Ann Arbor, MI 48109, USA
2. Department of Health and Nursing Science, Faculty of Social and Health Sciences, Inland Norway University of Applied Sciences, 2418 Elverum, Norway
3. Department of Health, Faculty of Health Sciences, VID Specialized University, 4024 Stavanger, Norway
4. Faculty of Health and Behavioural Sciences, The University of Queensland, Brisbane 4072, Australia
5. School of Nursing and Midwifery, Keele University, Staffordshire ST5 5BG, UK
6. School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
7. Department of Social Work, Child Welfare and Social Policy, Faculty of Social Sciences, Oslo Metropolitan University, N-0130 Oslo, Norway