[1] Univ Nigeria, Coll Med, Dept Pharmacol & Therapeut, Hlth Policy Res Grp, Enugu Campus, Enugu, Nigeria
[2] Univ Nigeria, Fac Hlth Sci & Technol, Dept Hlth Adm & Management, Enugu Campus, Enugu, Nigeria
[3] Univ Nigeria, Coll Med, Dept Community Med, Enugu Campus, Enugu, Nigeria
[4] Alex Ekwueme Fed Univ Teaching Hosp, Dept Community Med, Abakaliki, Ebonyi, Nigeria