[1] Cent Hosp Yaounde, Dept Neurol, Yaounde, Cameroon
[2] Univ Yaounde I, Fac Med & Biomed Sci, Dept Internal Med & Specialties, Yaounde, Cameroon
[3] Fann Univ, Ctr Hosp, Dakar, Senegal
[4] Minist Publ Hlth, Dept Dis Control, Yaounde, Cameroon
[5] Univ Yaounde I, Fac Med & Biomed Sci, Dept Surg, Yaounde, Cameroon