1. Department of Nursing; Umeå University; Umeå Sweden
2. Department of Statistics; Umeå School of Business and Economics; Umeå University; Umeå Sweden
3. Epidemiology and Global Health; Department of Public Health and Clinical Medicine; Umeå University; Umeå Sweden
4. Department of Community Medicine and Rehabilitation; Umeå University; Umeå Sweden
5. School of Nursing and Midwifery; La Trobe University; Melbourne Australia