[1] Lagos State Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Lagos, Nigeria
[2] Univ Maiduguri, Dept Med, Rheumatol Unit, Teaching Hosp, Maiduguri, Nigeria
[3] Univ Jos, Jos Univ Teaching Hosp, Dept Med, Rheumatol Unit, Jos, Nigeria
[4] Obafemi Awolowo Univ, Dept Med, Rheumatol Unit, Teaching Hosp Complex, Ife, Nigeria
[5] Lagos State Univ, Dept Family Med, Teaching Hosp, Lagos, Nigeria
[6] Ahmadu Bello Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Kaduna, Nigeria
[7] Lagos Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Lagos, Nigeria
[8] Kubwa Gen Hosp, Abuja, Nigeria
[9] Olabisi Onabanjo Univ, Rheumatol Unit, Teaching Hosp, Shagamu, Nigeria
[10] Nnamdi Azikwe Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Nnewi, Nigeria
[11] Univ Coll Hosp, Dept Med, Rheumatol Unit, Ibadan, Nigeria
[12] Aminu Kano Teaching Hosp, Dept Med, Rheumatol Unit, Kano, Nigeria
[13] Fed Med Ctr, Dept Med, Rheumatol Unit, Gombe, Nigeria
[14] Univ Benin, Dept Med, Rheumatol Unit, Teaching Hosp, Benin, Nigeria
[15] Jos Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Jos, Nigeria
[16] Univ Nigeria Teaching Hosp, Dept Med, Rheumatol Unit, Enugu, Nigeria
[17] Fed Med Ctr, Dept Med, Rheumatol Unit, Owerri, Nigeria
[18] Univ Port Harcourt, Dept Med, Rheumatol Unit, Port Harcourt, Nigeria
[19] Fed Med Ctr, Dept Med, Rheumatol Unit, Yenagoa, Nigeria
[20] Univ Calabar, Dept Med, Rheumatol Unit, Teaching Hosp, Calabar, Nigeria
[21] Ekiti State Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Ado Ekiti, Nigeria
[22] Univ Uyo, Dept Med, Rheumatol Unit, Teaching Hosp, Uyo, Nigeria
[23] Nnamdi Azikwe Teaching Hosp, Dept Med, Rheumatol Unit, Nnewi, Nigeria
[24] Fed Med Ctr, Dept Med, Rheumatol Unit, Katsina, Nigeria
[25] Usmanu Danfodiyo Univ, Dept Med, Rheumatol Unit, Teaching Hosp, Sokoto, Nigeria