[1] Univ Ibadan, Inst Adv Med Res & Training, Coll Med, Ibadan, Nigeria
[2] Univ Ibadan, Dept Psychiat, Coll Med, Ibadan, Nigeria
[3] Univ Ibadan, Dept Epidemiol & Med Stat, Coll Med, Ibadan, Nigeria
[4] Univ Ibadan, Dept Pathol, Coll Med, Ibadan, Nigeria
[5] Univ Ibadan, Dept Anat, Coll Med, Ibadan, Nigeria
[6] Univ Coll Hosp, Chief Tony Anenih Geriatr Ctr, Ibadan, Nigeria
[7] Univ Ibadan, Fac Social Sci, Dept Sociol, Ibadan, Nigeria
[8] Newcastle Univ, Inst Neurosci, Newcastle Upon Tyne, Tyne & Wear, England
[9] Univ Ibadan, Dept Med, Coll Med, Ibadan, Nigeria
[10] Univ Ibadan, Dept Surg, Coll Med, Ibadan, Nigeria
[11] Univ Ibadan, Dept Radiol, Coll Med, Ibadan, Nigeria
[12] Univ Ibadan, Dept Hlth Promot & Educ, Coll Med, Ibadan, Nigeria
[13] Univ Ibadan, Coll Med, Neurosci & Ageing Res Unit, Ibadan, Nigeria