[1] Bayero Univ, Dept Environm Management, Kano, Nigeria
[2] Bayero Univ, Aminu Kano Teaching Hosp, Dept Community Med, Kano, Nigeria
[3] Aminu Kano Teaching Hosp, Dept Nursing Sci, Hemodialysis Unit, Kano, Nigeria
[4] Fed Univ Dutse, Dept Internal Med, Jigawa, Nigeria
[5] Aminu Kano Teaching Hosp, Dept Internal Med, Kano, Nigeria
[6] Bayero Univ, Aminu Kano Teaching Hosp, Dept Chem Pathol & Immunol, Kano, Nigeria