[1] Nnamdi Azikiwe Univ, Dept Med, Teaching Hosp, Nnewi, Anambra State, Nigeria
[2] Nnamdi Azikiwe Univ, Dept Internal Med, Awka, Anambra State, Nigeria
[3] Nnamdi Azikiwe Univ, Dept Med Rehabil, Awka, Anambra State, Nigeria
[4] Nnamdi Azikiwe Univ, Dept Psychiat, Dept Mental Hlth, Awka, Anambra State, Nigeria
[5] Enugu State Univ Sci & Technol, Teaching Hosp Parklane, Dept Internal Med, Neurol Unit, Enugu, Nigeria
[6] Univ Ibadan, Univ Coll Hosp, Dept Internal Med, Ibadan, Nigeria
[7] Leeds Gen Infirm, Dept Neurol, Leeds, England
[8] Musgrove Pk Hosp, Stroke Med, Taunton, England