[1] Univ Nigeria Enugu Campus, Dept Haematol & Immunol, Enugu 400001, Nigeria
[2] Aminu Kano Teaching Hosp, Dept Haematol, Kano, Nigeria
[3] Fed Med Ctr, Dept Haematol, Birinin Kebbi, Niger
[4] Univ Coll Hosp, Dept Haematol, Ibadan, Nigeria
[5] Ahmadu Bello Univ, Teaching Hosp, Dept Haematol, Zaria, Nigeria
[6] Univ Calabar, Teaching Hosp, Dept Haematol, Calabar, Nigeria
[7] Ladoke Akintola Univ Technol, Dept Haematol, Ogbomosho, Nigeria
[8] Univ Nigeria Enugu Campus, Dept Paediat, Enugu 400001, Nigeria
[9] Nnamdi Azikiwe Univ, Dept Haematol, Nnewi, Nigeria
[10] Benue State Unversity, Dept Haematol, Makurdi, Benue State, Nigeria
[11] Fed Med Ctr, Dept Haematol, Owerri, Nigeria
[12] Univ Port Harcourt, Teaching Hosp, Dept Haematol, Port Harcourt, Rivers State, Nigeria
[13] Univ Nigeria, Teaching Hosp, Dept Haematol & Immunol, Ituku Ozalla, Nigeria
[14] Univ Benin, Teaching Hosp, Dept Haematol, Benin, Nigeria