1. Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
2. Physiotherapy Department, Faculty of Rehabilitation Medicine, Kilimanjaro Christian Medical University College, Moshi, Tanzania
3. Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, Umeå, Sweden
4. Department of Epidemiology and Global Health, Umea University, Umea, Sweden