1. The Medical SchoolNewcastle University, Newcastle upon Tyne, UK
2. Northumbria Healthcare NHS Foundation Trust, North Tyneside General Hospital, North Shields, UK
3. Institute of NeuroscienceNewcastle University, Newcastle upon Tyne, UK
4. Hai District Medical Office Hai, Tanzania
5. Institute of AgeingNewcastle University, Newcastle upon Tyne, UK
6. Community Health DepartmentKilimanjaro Christian Medical University College, Moshi, Tanzania
7. Department of MedicineKilimanjaro Christian Medical Centre, Moshi, Tanzania
8. Institute of Health and SocietyNewcastle University, Newcastle upon Tyne, UK