1. Department of Physiotherapy, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania
2. Department of Epidemiology and Global Health, Umeå University, Umeå, Sweden
3. Department of Community Medicine and Rehabilitation, Umeå University, Umeå, Sweden
4. Community Health Department, Institute of Public Health, Kilimanjaro Christian Medical University College, Moshi, Tanzania
5. Department of Epidemiology and Biostatistics, Institute of Public Health, Kilimanjaro Christian Medical University College, Moshi, Tanzania
6. Department of Community Medicine, Kilimanjaro Christian Medical Centre, Moshi, Tanzania